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Datastax Driver Fully Implemented - Partially Tested - return of deprecated methods

This commit is contained in:
Ahmed Salah Tawfik Ibrahim 2023-10-30 18:52:02 +01:00
parent 6465e88378
commit 3bd81a415f
6 changed files with 2194 additions and 1706 deletions
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4
CHANGELOG.md
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@ -4,9 +4,9 @@
All notable changes to this project will be documented in this file. All notable changes to this project will be documented in this file.
This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html). This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
## [v1.18.0] - 2022-09-20 ## [v2.0.0] - 2023-10-30
- Feature #23891, The (wrongly named) Feed class has been changed to Post, all the methods have been changed accordingly and the old one set as deprecated - Feature #25901-fix, same as feature 25901 but with minor fixes related to deprecated methods and classes
## [v1.17.0] - 2022-05-13 ## [v1.17.0] - 2022-05-13

81
pom.xml
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@ -11,7 +11,7 @@
<groupId>org.gcube.portal</groupId> <groupId>org.gcube.portal</groupId>
<artifactId>social-networking-library</artifactId> <artifactId>social-networking-library</artifactId>
<version>1.18.0</version> <version>2.0.0-SNAPSHOT</version>
<name>gCube Social Networking Library</name> <name>gCube Social Networking Library</name>
<description> <description>
The gCube Social Networking Library is the 'bridge' between your gCube Applications and the social networking facilities. The gCube Social Networking Library is the 'bridge' between your gCube Applications and the social networking facilities.
@ -28,57 +28,39 @@
<gwtVersion>2.8.1</gwtVersion> <gwtVersion>2.8.1</gwtVersion>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<cassandra.driver.oss.version>4.13.0</cassandra.driver.oss.version>
<logback.version>1.2.3</logback.version>
</properties> </properties>
<dependencyManagement>
<dependencies> <dependencies>
<dependency> <dependency>
<groupId>org.gcube.distribution</groupId> <groupId>com.datastax.oss</groupId>
<artifactId>maven-portal-bom</artifactId> <artifactId>java-driver-query-builder</artifactId>
<version>3.6.4</version> <version>${cassandra.driver.oss.version}</version>
<type>pom</type> </dependency>
<scope>import</scope> <dependency>
<groupId>com.datastax.oss</groupId>
<artifactId>java-driver-mapper-runtime</artifactId>
<version>${cassandra.driver.oss.version}</version>
</dependency> </dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency> <dependency>
<groupId>com.google</groupId> <groupId>com.google</groupId>
<artifactId>gwt-jsonmaker</artifactId> <artifactId>gwt-jsonmaker</artifactId>
</dependency> <version>1.2.1</version>
<dependency>
<groupId>com.netflix.astyanax</groupId>
<artifactId>astyanax-core</artifactId>
<scope>provided</scope>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>log4j-over-slf4j</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>com.netflix.astyanax</groupId>
<artifactId>astyanax-thrift</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.netflix.astyanax</groupId>
<artifactId>astyanax-cassandra</artifactId>
<scope>provided</scope>
</dependency> </dependency>
<dependency> <dependency>
<groupId>org.gcube.resources.discovery</groupId> <groupId>org.gcube.resources.discovery</groupId>
<artifactId>ic-client</artifactId> <artifactId>ic-client</artifactId>
<version>[1.0.5-SNAPSHOT,2.0.0-SNAPSHOT)</version>
</dependency> </dependency>
<dependency> <dependency>
<groupId>org.gcube.common.portal</groupId> <groupId>org.gcube.common.portal</groupId>
<artifactId>portal-manager</artifactId> <artifactId>portal-manager</artifactId>
<scope>provided</scope> <version>[2.4.2-SNAPSHOT,3.0.0-SNAPSHOT)</version>
</dependency> </dependency>
<dependency> <dependency>
<groupId>com.sun.mail</groupId> <groupId>com.sun.mail</groupId>
<artifactId>javax.mail</artifactId> <artifactId>javax.mail</artifactId>
<scope>provided</scope> <version>1.5.2</version>
</dependency> </dependency>
<dependency> <dependency>
<groupId>junit</groupId> <groupId>junit</groupId>
@ -89,15 +71,21 @@
<groupId>com.google.gwt</groupId> <groupId>com.google.gwt</groupId>
<artifactId>gwt-user</artifactId> <artifactId>gwt-user</artifactId>
<version>${gwtVersion}</version> <version>${gwtVersion}</version>
<scope>provided</scope>
</dependency> </dependency>
<dependency> <dependency>
<groupId>org.slf4j</groupId> <groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId> <artifactId>slf4j-log4j12</artifactId>
<version>1.6.4</version>
</dependency> </dependency>
<dependency> <dependency>
<groupId>org.slf4j</groupId> <groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId> <artifactId>slf4j-api</artifactId>
<version>1.6.4</version>
</dependency>
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.6</version>
</dependency> </dependency>
</dependencies> </dependencies>
<build> <build>
@ -135,6 +123,31 @@
<skipTests>true</skipTests> <skipTests>true</skipTests>
</configuration> </configuration>
</plugin> </plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<version>3.4.2</version>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<mainClass>org.gcube.portal.databook.server.Tester</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
<executions>
<execution>
<id>assemble-all</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins> </plugins>
</build> </build>

687
src/main/java/org/gcube/portal/databook/server/CassandraClusterConnection.java
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@ -1,33 +1,25 @@
package org.gcube.portal.databook.server; package org.gcube.portal.databook.server;
import java.util.HashMap; import java.net.InetSocketAddress;
import java.util.Map; import java.time.Duration;
import java.util.UUID; import java.util.List;
import com.datastax.oss.driver.api.core.CqlSession;
import com.datastax.oss.driver.api.core.CqlSessionBuilder;
import com.datastax.oss.driver.api.core.config.DefaultDriverOption;
import com.datastax.oss.driver.api.core.config.DriverConfigLoader;
import com.datastax.oss.driver.api.core.cql.ResultSet;
import com.datastax.oss.driver.api.core.metadata.Metadata;
import com.datastax.oss.driver.api.core.metadata.schema.KeyspaceMetadata;
import com.datastax.oss.driver.api.core.type.DataTypes;
import com.datastax.oss.driver.api.querybuilder.SchemaBuilder;
import org.slf4j.Logger; import org.slf4j.Logger;
import org.slf4j.LoggerFactory; import org.slf4j.LoggerFactory;
import com.netflix.astyanax.AstyanaxContext;
import com.netflix.astyanax.Cluster;
import com.netflix.astyanax.Keyspace;
import com.netflix.astyanax.connectionpool.NodeDiscoveryType;
import com.netflix.astyanax.connectionpool.OperationResult;
import com.netflix.astyanax.connectionpool.exceptions.ConnectionException;
import com.netflix.astyanax.connectionpool.impl.ConnectionPoolConfigurationImpl;
import com.netflix.astyanax.connectionpool.impl.ConnectionPoolType;
import com.netflix.astyanax.connectionpool.impl.CountingConnectionPoolMonitor;
import com.netflix.astyanax.ddl.ColumnDefinition;
import com.netflix.astyanax.ddl.ColumnFamilyDefinition;
import com.netflix.astyanax.ddl.KeyspaceDefinition;
import com.netflix.astyanax.ddl.SchemaChangeResult;
import com.netflix.astyanax.impl.AstyanaxConfigurationImpl;
import com.netflix.astyanax.thrift.ThriftFamilyFactory;
import com.netflix.astyanax.thrift.ddl.ThriftColumnDefinitionImpl;
import com.netflix.astyanax.thrift.ddl.ThriftColumnFamilyDefinitionImpl;
/** /**
* @author Massimiliano Assante ISTI-CNR * @author Massimiliano Assante ISTI-CNR
* @author Costantino Perciante ISTI-CNR * @author Ahmed Salah Tawfik Ibrahim ISTI-CNR
* *
*/ */
public class CassandraClusterConnection { public class CassandraClusterConnection {
@ -39,304 +31,473 @@ public class CassandraClusterConnection {
/** /**
* keyspace location * keyspace location
*/ */
private static String clusterName; private static List<InetSocketAddress> hosts;
private static String host; private static String datacenterName;
private static String keyspaceName; private static String keyspaceName;
private CqlSession myKeyspaceSession;
private Keyspace myKeyspace;
/** /**
* *
* @param dropSchema set true if you want do drop the current and set up new one * @param dropSchema set true if you want do drop the current and set up new one
* the connection to cassandra cluster * the connection to cassandra cluster
*/ */
protected CassandraClusterConnection(boolean dropSchema) { protected CassandraClusterConnection(boolean dropSchema) {
if (clusterName == null || host == null || keyspaceName == null) { if (hosts == null || datacenterName == null || keyspaceName == null) {
RunningCluster cluster = RunningCluster.getInstance(null); RunningCluster cluster = RunningCluster.getInstance(null);
clusterName = cluster.getClusterName();
host = cluster.getHost(); //host = cluster.getHost();
hosts = cluster.getHosts();
datacenterName = cluster.getDatacenterName();
keyspaceName = cluster.getKeyspaceName(); keyspaceName = cluster.getKeyspaceName();
} }
AstyanaxContext<Cluster> clusterContext = new AstyanaxContext.Builder()
.forCluster(clusterName)
.withAstyanaxConfiguration(new AstyanaxConfigurationImpl())
.withConnectionPoolConfiguration(
new ConnectionPoolConfigurationImpl(
clusterName).setMaxConnsPerHost(100)
.setSeeds(host))
.withConnectionPoolMonitor(
new CountingConnectionPoolMonitor())
.buildCluster(ThriftFamilyFactory.getInstance());
_log.info(keyspaceName + " KeySpace SetUp ..."); _log.info(keyspaceName + " KeySpace SetUp ...");
SetUpKeySpaces(clusterContext, dropSchema); SetUpKeySpaces(dropSchema);
myKeyspaceSession = connect(keyspaceName);
_log.info("CONNECTED! using KeySpace: " + keyspaceName); _log.info("CONNECTED! using KeySpace: " + keyspaceName);
// then close connection pool for cluster
_log.info("Closing cluster connection pool no longer needed (keyspace one will be used)");
clusterContext.shutdown();
_log.info("Closed cluster connection pool no longer needed (keyspace one will be used)");
}
/**
* Close the connection pool
*/
public void closeConnection(){
if(myKeyspace != null){
try{
_log.info("Closing pool connection");
myKeyspace.getConnectionPool().shutdown();
_log.info("Pool closed!");
}catch(Exception e){
_log.error("Unable to close connection pool", e);
}
}
} }
/** /**
* *
* @param dropSchema set true if you want do drop the current and set up new one * @param dropSchema set true if you want to drop the current and set up new one
* the connection to cassandra cluster * the connection to cassandra cluster
*/ */
protected CassandraClusterConnection(boolean dropSchema, String infrastructureName) { protected CassandraClusterConnection(boolean dropSchema, String infrastructureName) {
if (clusterName == null || host == null || keyspaceName == null) { if (hosts == null || datacenterName == null || keyspaceName == null) {
RunningCluster cluster = RunningCluster.getInstance(infrastructureName); RunningCluster cluster = RunningCluster.getInstance(infrastructureName);
clusterName = cluster.getClusterName(); //host = cluster.getHost();
host = cluster.getHost(); hosts = cluster.getHosts();
datacenterName = cluster.getDatacenterName();
keyspaceName = cluster.getKeyspaceName(); keyspaceName = cluster.getKeyspaceName();
} }
AstyanaxContext<Cluster> clusterContext = new AstyanaxContext.Builder()
.forCluster(clusterName)
.withAstyanaxConfiguration(new AstyanaxConfigurationImpl())
.withConnectionPoolConfiguration(
new ConnectionPoolConfigurationImpl(
clusterName).setMaxConnsPerHost(100)
.setSeeds(host))
.withConnectionPoolMonitor(
new CountingConnectionPoolMonitor())
.buildCluster(ThriftFamilyFactory.getInstance());
_log.info(keyspaceName + " KeySpace SetUp ..."); _log.info(keyspaceName + " KeySpace SetUp ...");
SetUpKeySpaces(clusterContext, dropSchema); SetUpKeySpaces(dropSchema);
myKeyspaceSession = connect(keyspaceName);
_log.info("CONNECTED! using KeySpace: " + keyspaceName); _log.info("CONNECTED! using KeySpace: " + keyspaceName);
}
// then close connection pool for cluster public CqlSession getKeyspaceSession(){
_log.info("Closing cluster connection pool no longer needed (keyspace one will be used)"); if (myKeyspaceSession.isClosed()){
clusterContext.shutdown(); myKeyspaceSession = connect(keyspaceName);
_log.info("Closed cluster connection pool no longer needed (keyspace one will be used)"); }
return myKeyspaceSession;
} }
/** /**
* Get the reference to the current keyspace * @param dropSchema set true if you want to drop the current and set up new one
* @return keyspace reference * the connection to cassandra cluster
*/ */
public Keyspace getKeyspace() { public void SetUpKeySpaces(boolean dropSchema) {
// The Keyspace instance can be shared among different requests
if(myKeyspace == null){
synchronized(this){
if(myKeyspace == null){ // double checked lock
AstyanaxContext<Keyspace> context = new AstyanaxContext.Builder()
.forCluster(clusterName)
.forKeyspace(keyspaceName)
.withAstyanaxConfiguration(
new AstyanaxConfigurationImpl()
.setDiscoveryType(NodeDiscoveryType.NONE) // use only the host given as seeds (do not discover)
.setConnectionPoolType(ConnectionPoolType.ROUND_ROBIN) // how to handle connections of the the connection pool
)
.withConnectionPoolConfiguration(
new ConnectionPoolConfigurationImpl("MyConnectionPool")
.setMaxConnsPerHost(3) // for each seed(host)
.setSocketTimeout(2000) //-> default: 11 seconds
//.setConnectTimeout(1000) -> default: 2 seconds
.setSeeds(host)
)
.withConnectionPoolMonitor(new CountingConnectionPoolMonitor())
.buildKeyspace(ThriftFamilyFactory.getInstance());
context.start();
// save keyspace reference
myKeyspace = context.getEntity();
}
}
}
return myKeyspace;
}
/**
*
* @param clusterContext
* @param dropSchema
* @throws ConnectionException
*/
public void SetUpKeySpaces(AstyanaxContext<Cluster> clusterContext, boolean dropSchema) {
boolean createNew = false; boolean createNew = false;
clusterContext.start(); boolean found = false;
CqlSession session = connect();
Metadata metaData = session.getMetadata();
for (KeyspaceMetadata meta : metaData.getKeyspaces().values()) {
if (meta.getName().toString().equals(keyspaceName)){
found = true;
break;
}
}
try { try {
Cluster cluster = clusterContext.getEntity(); if (dropSchema && found) {
KeyspaceDefinition keyspaceDef = cluster.describeKeyspace(keyspaceName);
if (dropSchema && keyspaceDef != null) {
_log.info("Dropping Keyspace: " + keyspaceName + " ..."); _log.info("Dropping Keyspace: " + keyspaceName + " ...");
try { try {
OperationResult<SchemaChangeResult> returned = cluster.dropKeyspace(keyspaceName); ResultSet returned = dropKeyspace();
Thread.sleep(2000); Thread.sleep(2000);
_log.info("Dropped " + returned.getResult().toString()); if (returned.wasApplied())
} catch (ConnectionException e) { _log.info("Dropped " + keyspaceName);
else
_log.info("Couldn't drop " + keyspaceName);
} catch (Exception e) {
_log.error("Dropping Keyspace operation Failed ... " + keyspaceName + " does NOT exists"); _log.error("Dropping Keyspace operation Failed ... " + keyspaceName + " does NOT exists");
return; return;
} catch (InterruptedException e) {
e.printStackTrace();
} }
createNew = true; createNew = true;
} }
keyspaceDef = cluster.makeKeyspaceDefinition(); if (!found || createNew) {
keyspaceDef = cluster.describeKeyspace(keyspaceName);
if (keyspaceDef == null || keyspaceDef.getName() == null || createNew) {
_log.info("Keyspace does not exist, triggering schema creation ... "); _log.info("Keyspace does not exist, triggering schema creation ... ");
createSchema(cluster); int replicationFactor = 2;
_log.info("Cluster " + clusterName + " on " + host + " Initialized OK!"); createKeyspace(keyspaceName, replicationFactor);
closeSession(session);
createTables();
_log.info("Using Keyspace " + keyspaceName); _log.info("Using Keyspace " + keyspaceName);
} }
} catch (ConnectionException e) { } catch (Exception e) {
e.printStackTrace(); e.printStackTrace();
} }
} }
/* /*
* *
********************** CASSANDRA KEYSPACE CREATION *********************** ********************** CASSANDRA KEYSPACE CREATION ***********************
* *
*/ */
/** private static CqlSession connect() {
* create the databook schema CqlSession cqlSession = configBuilder(CqlSession.builder())
* @return .addContactPoints(hosts)
* @throws ConnectionException .withLocalDatacenter(datacenterName)
*/ .build();
private void createSchema(Cluster cluster) throws ConnectionException { _log.info("[OK] Connected to Cassandra Cluster");
return cqlSession;
Map<String, String> stratOptions = new HashMap<String, String>(); }
stratOptions.put("replication_factor", "1"); private static CqlSession connect(String KEYSPACE_NAME) {
CqlSession cqlSession = configBuilder(CqlSession.builder())
KeyspaceDefinition ksDef = cluster.makeKeyspaceDefinition(); .addContactPoints(hosts)
.withKeyspace(KEYSPACE_NAME)
//get static column families with secondary indexes .withLocalDatacenter("1")
/** .build();
* define Notifications CF with Type as secondary index _log.info("[OK] Connected to Keyspace {} ", KEYSPACE_NAME);
*/ return cqlSession;
ColumnFamilyDefinition cfDefNotifications = getStaticCFDef(DBCassandraAstyanaxImpl.NOTIFICATIONS, "Type");
/**
* define Feeds CF with Privacy as secondary index
*/
ColumnFamilyDefinition cfDefFeeds = getStaticCFDef(DBCassandraAstyanaxImpl.FEEDS, "Privacy");
/**
* define Comments CF with FeedId as secondary index
*/
ColumnFamilyDefinition cfDefComments = getStaticCFDef(DBCassandraAstyanaxImpl.COMMENTS, "Feedid");
/**
* define Likes CF with FeedId as secondary index
*/
ColumnFamilyDefinition cfDefLikes = getStaticCFDef(DBCassandraAstyanaxImpl.LIKES, "Feedid");
/**
* define Invites CF with SenderUserId as secondary index
*/
ColumnFamilyDefinition cfDefInvites = getStaticCFDef(DBCassandraAstyanaxImpl.INVITES, "SenderUserId");
/**
* define Attachments CF with FeedId as secondary index
*/
ColumnFamilyDefinition cfDefAttachments = getStaticCFDef(DBCassandraAstyanaxImpl.ATTACHMENTS, "feedId");
//get dynamic column families, act as auxiliary indexes
ColumnFamilyDefinition cfDefConn = getDynamicCFDef(DBCassandraAstyanaxImpl.CONNECTIONS);
ColumnFamilyDefinition cfDefPendingConn = getDynamicCFDef(DBCassandraAstyanaxImpl.PENDING_CONNECTIONS_CF_NAME);
ColumnFamilyDefinition cfDefVRETimeline = getDynamicCFDef(DBCassandraAstyanaxImpl.VRE_TIMELINE_FEEDS);
ColumnFamilyDefinition cfDefAPPTimeline = getDynamicCFDef(DBCassandraAstyanaxImpl.APP_TIMELINE_FEEDS);
ColumnFamilyDefinition cfDefUserTimeline = getDynamicCFDef(DBCassandraAstyanaxImpl.USER_TIMELINE_FEEDS);
ColumnFamilyDefinition cfDefUserLikedFeeds = getDynamicCFDef(DBCassandraAstyanaxImpl.USER_LIKED_FEEDS);
ColumnFamilyDefinition cfDefUserNotifications = getDynamicCFDef(DBCassandraAstyanaxImpl.USER_NOTIFICATIONS);
ColumnFamilyDefinition cfDefUserNotificationsUnread = getDynamicCFDef(DBCassandraAstyanaxImpl.USER_NOTIFICATIONS_UNREAD);
ColumnFamilyDefinition cfDefUserNotificationsPreferences = getDynamicCFDef(DBCassandraAstyanaxImpl.USER_NOTIFICATIONS_PREFERENCES);
ColumnFamilyDefinition cfDefEmailInvitesTimeline = getDynamicCFDef(DBCassandraAstyanaxImpl.EMAIL_INVITES);
ColumnFamilyDefinition cfDefVREInvitesTimeline = getDynamicCFDef(DBCassandraAstyanaxImpl.VRE_INVITES);
ColumnFamilyDefinition cfDefHashtagsCounter = getDynamicCFDef(DBCassandraAstyanaxImpl.HASHTAGS_COUNTER);
ColumnFamilyDefinition cfDefHashtagTimeline = getDynamicCFDef(DBCassandraAstyanaxImpl.HASHTAGGED_FEEDS);
ColumnFamilyDefinition cfDefHashtagCommentsTimeline = getDynamicCFDef(DBCassandraAstyanaxImpl.HASHTAGGED_COMMENTS);
ksDef.setName(keyspaceName)
.setStrategyOptions(stratOptions)
.setStrategyClass("SimpleStrategy")
.addColumnFamily(cfDefNotifications)
.addColumnFamily(cfDefFeeds)
.addColumnFamily(cfDefComments)
.addColumnFamily(cfDefLikes)
.addColumnFamily(cfDefInvites)
.addColumnFamily(cfDefAttachments)
.addColumnFamily(cfDefConn)
.addColumnFamily(cfDefPendingConn)
.addColumnFamily(cfDefVRETimeline)
.addColumnFamily(cfDefAPPTimeline)
.addColumnFamily(cfDefUserTimeline)
.addColumnFamily(cfDefUserNotifications)
.addColumnFamily(cfDefUserNotificationsUnread)
.addColumnFamily(cfDefUserNotificationsPreferences)
.addColumnFamily(cfDefUserLikedFeeds)
.addColumnFamily(cfDefEmailInvitesTimeline)
.addColumnFamily(cfDefVREInvitesTimeline)
.addColumnFamily(cfDefHashtagsCounter)
.addColumnFamily(cfDefHashtagTimeline)
.addColumnFamily(cfDefHashtagCommentsTimeline);
cluster.addKeyspace(ksDef);
} }
/** public static void closeSession(CqlSession session) {
* create a dynamic column family to be added in a keyspace if (session != null) session.close();
* _log.info("[OK]Session is now closed");
* @param cfName the CF name
* @return the instance to be added to the keyspace
*/
private ColumnFamilyDefinition getDynamicCFDef(String cfName) {
ColumnFamilyDefinition columnFamilyDefinition = new ThriftColumnFamilyDefinitionImpl();
columnFamilyDefinition.setName(cfName);
columnFamilyDefinition.setKeyValidationClass("UTF8Type");
columnFamilyDefinition.setComparatorType("UTF8Type");
return columnFamilyDefinition;
} }
/** public void closeConnection(){
* create a static column family to be added in a keyspace with possibility to add a secondary index for a given column if(!myKeyspaceSession.isClosed()){
* try{
* @param cfName the CF name _log.info("Closing connection");
* @param secondaryIndexedField the column name of the column to index closeSession(myKeyspaceSession);
* @return the instance to be added to the keyspace _log.info("Connection closed!");
*/ }catch(Exception e){
private ColumnFamilyDefinition getStaticCFDef(String cfName, String secondaryIndexedField) { _log.error("Unable to close connection", e);
ColumnFamilyDefinition columnFamilyDefinition = new ThriftColumnFamilyDefinitionImpl();
columnFamilyDefinition.setName(cfName);
columnFamilyDefinition.setKeyValidationClass("UTF8Type");
columnFamilyDefinition.setComparatorType("UTF8Type");
//Add secondary index for userid
ColumnDefinition typeCDef = new ThriftColumnDefinitionImpl();
typeCDef.setName(secondaryIndexedField)
.setValidationClass("UTF8Type");
typeCDef.setIndex(secondaryIndexedField+"_"+UUID.randomUUID().toString().substring(0,5), "KEYS");
columnFamilyDefinition.addColumnDefinition(typeCDef);
return columnFamilyDefinition;
} }
} }
}
private static CqlSessionBuilder configBuilder(CqlSessionBuilder cqlSessionBuilder){
return cqlSessionBuilder
.withConfigLoader(DriverConfigLoader.programmaticBuilder()
// Resolves the timeout query 'SELECT * FROM system_schema.tables' timed out after PT2S
.withDuration(DefaultDriverOption.METADATA_SCHEMA_REQUEST_TIMEOUT, Duration.ofMillis(240000))
.withDuration(DefaultDriverOption.CONNECTION_INIT_QUERY_TIMEOUT, Duration.ofMillis(240000))
.withDuration(DefaultDriverOption.REQUEST_TIMEOUT, Duration.ofMillis(240000))
.build());
}
private static void createKeyspace(String keyspaceName, int replicationFactor) {
try (CqlSession cqlSession = configBuilder(CqlSession.builder())
.addContactPoints(hosts)
.withLocalDatacenter("1")
.build()) {
cqlSession.execute(SchemaBuilder.createKeyspace(keyspaceName)
.ifNotExists()
.withSimpleStrategy(replicationFactor)
.withDurableWrites(true)
.build());
_log.info("+ Keyspace '{}' created.", keyspaceName);
closeSession(cqlSession);
}
}
private static ResultSet dropKeyspace(){
ResultSet toreturn;
try (CqlSession cqlSession = configBuilder(CqlSession.builder())
.addContactPoints(hosts)
.withLocalDatacenter("1")
.build()) {
toreturn = cqlSession.execute(SchemaBuilder.dropKeyspace(keyspaceName).ifExists().build());
_log.info("Keyspace {} dropped.", keyspaceName);
closeSession(cqlSession);
}
return toreturn;
}
private void createTables(){
try (CqlSession cqlSession = configBuilder(CqlSession.builder())
.addContactPoints(hosts)
.withLocalDatacenter("1")
.withKeyspace(keyspaceName)
.build()) {
createTableUSERNotificationsPreferences(cqlSession);
createTableUSERNotifications(cqlSession);
createTableVRETimeline(cqlSession);
createTableAppTimeline(cqlSession);
createTableUSERTimeline(cqlSession);
createTableHashtaggedPosts(cqlSession);
createTableHashtaggedComments(cqlSession);
createTableHashtagsCounter(cqlSession);
createTableUSERNotificationsUnread(cqlSession);
createTableUSERLikes(cqlSession);
createTableVREInvites(cqlSession);
createTableEMAILInvites(cqlSession);
createTableAttachments(cqlSession);
createTableInvites(cqlSession);
createTableLikes(cqlSession);
createTableComments(cqlSession);
createTableNotifications(cqlSession);
createTablePosts(cqlSession);
closeSession(cqlSession);
}
}
private void createTableUSERNotificationsPreferences(CqlSession cqlSession) {
cqlSession.execute(SchemaBuilder.createTable("UserNotificationsPreferences")
.ifNotExists()
.withPartitionKey("userid", DataTypes.TEXT)
.withPartitionKey("type", DataTypes.TEXT)
.withColumn("preference", DataTypes.TEXT)
.withCompactStorage()
.build());
_log.info("+ Table '{}' has been created (if needed).", "USERNotificationsPreferences");
}
private void createTableUSERNotifications(CqlSession cqlSession) {
cqlSession.execute(SchemaBuilder.createTable("UserNotifications")
.ifNotExists()
.withPartitionKey("userid", DataTypes.TEXT)
.withPartitionKey("timestamp", DataTypes.TIMESTAMP)
.withColumn("notid", DataTypes.UUID)
.withCompactStorage()
.build());
_log.info("+ Table '{}' has been created (if needed).", "USERNotifications");
}
private void createTableVRETimeline(CqlSession cqlSession) {
cqlSession.execute(SchemaBuilder.createTable("VRETimeline")
.ifNotExists()
.withPartitionKey("vreid", DataTypes.TEXT)
.withPartitionKey("timestamp", DataTypes.TIMESTAMP)
.withColumn("postid", DataTypes.UUID)
.withCompactStorage()
.build());
_log.info("+ Table '{}' has been created (if needed).", "VRETimeline");
}
private void createTableAppTimeline(CqlSession cqlSession) {
cqlSession.execute(SchemaBuilder.createTable("AppTimeline")
.ifNotExists()
.withPartitionKey("appid", DataTypes.TEXT)
.withPartitionKey("timestamp", DataTypes.TIMESTAMP)
.withColumn("postid", DataTypes.UUID)
.withCompactStorage()
.build());
_log.info("+ Table '{}' has been created (if needed).", "AppTimeline");
}
private void createTableUSERTimeline(CqlSession cqlSession) {
cqlSession.execute(SchemaBuilder.createTable("UserTimeline")
.ifNotExists()
.withPartitionKey("userid", DataTypes.TEXT)
.withPartitionKey("timestamp", DataTypes.TIMESTAMP)
.withColumn("postid", DataTypes.UUID)
.withCompactStorage()
.build());
_log.info("+ Table '{}' has been created (if needed).", "USERTimeline");
}
private void createTableHashtaggedPosts(CqlSession cqlSession) {
cqlSession.execute(SchemaBuilder.createTable("HashtaggedPosts")
.ifNotExists()
.withPartitionKey("hashtag", DataTypes.TEXT)
.withPartitionKey("postid", DataTypes.UUID)
.withColumn("vreid", DataTypes.TEXT)
.withCompactStorage()
.build());
_log.info("+ Table '{}' has been created (if needed).", "HashtaggedPosts");
}
private void createTableHashtaggedComments(CqlSession cqlSession) {
cqlSession.execute(SchemaBuilder.createTable("HashtaggedComments")
.ifNotExists()
.withPartitionKey("hashtag", DataTypes.TEXT)
.withPartitionKey("commentid", DataTypes.UUID)
.withColumn("vreid", DataTypes.TEXT)
.withCompactStorage()
.build());
_log.info("+ Table '{}' has been created (if needed).", "HashtaggedComments");
}
private void createTableHashtagsCounter(CqlSession cqlSession) {
cqlSession.execute(SchemaBuilder.createTable("HashtagsCounter")
.ifNotExists()
.withPartitionKey("vreid", DataTypes.TEXT)
.withPartitionKey("hashtag", DataTypes.TEXT)
.withColumn("count", DataTypes.BIGINT)
.withCompactStorage()
.build());
_log.info("+ Table '{}' has been created (if needed).", "HashtagsCounter");
}
private void createTableUSERNotificationsUnread(CqlSession cqlSession) {
cqlSession.execute(SchemaBuilder.createTable("UserUnreadNotifications")
.ifNotExists()
.withPartitionKey("userid", DataTypes.TEXT)
.withPartitionKey("timestamp", DataTypes.TIMESTAMP)
.withColumn("notid", DataTypes.UUID)
.withCompactStorage()
.build());
_log.info("+ Table '{}' has been created (if needed).", "USERNotificationsUnread");
}
private void createTableUSERLikes(CqlSession cqlSession) {
cqlSession.execute(SchemaBuilder.createTable("UserLikes")
.ifNotExists()
.withPartitionKey("userid", DataTypes.TEXT)
.withPartitionKey("likeid", DataTypes.UUID)
.withColumn("postid", DataTypes.UUID)
.withCompactStorage()
.build());
_log.info("+ Table '{}' has been created (if needed).", "USERLikes");
}
private void createTableVREInvites(CqlSession cqlSession) {
cqlSession.execute(SchemaBuilder.createTable("VREInvites")
.ifNotExists()
.withPartitionKey("vreid", DataTypes.TEXT)
.withPartitionKey("inviteid", DataTypes.UUID)
.withColumn("status", DataTypes.TEXT)
.withCompactStorage()
.build());
_log.info("+ Table '{}' has been created (if needed).", "VREInvites");
}
private void createTableEMAILInvites(CqlSession cqlSession) {
cqlSession.execute(SchemaBuilder.createTable("EmailInvites")
.ifNotExists()
.withPartitionKey("email", DataTypes.TEXT)
.withPartitionKey("vreid", DataTypes.TEXT)
.withColumn("inviteid", DataTypes.UUID)
.withCompactStorage()
.build());
_log.info("+ Table '{}' has been created (if needed).", "EMAILInvites");
}
private void createTableAttachments(CqlSession cqlSession) {
cqlSession.execute(SchemaBuilder.createTable("Attachments")
.ifNotExists()
.withPartitionKey("attachid", DataTypes.UUID)
.withColumn("postid", DataTypes.UUID)
.withColumn("uri", DataTypes.TEXT)
.withColumn("name", DataTypes.TEXT)
.withColumn("description", DataTypes.TEXT)
.withColumn("urithumbnail", DataTypes.TEXT)
.withColumn("mimetype", DataTypes.TEXT)
.withCompactStorage()
.build());
cqlSession.execute(SchemaBuilder.createIndex("post_attach")
.ifNotExists()
.onTable("Attachments")
.andColumn("postid")
.build());
_log.info("+ Table '{}' has been created (if needed).", "Attachments");
}
private void createTableInvites(CqlSession cqlSession) {
cqlSession.execute(SchemaBuilder.createTable("Invites")
.ifNotExists()
.withPartitionKey("inviteid", DataTypes.UUID)
.withColumn("senderuserid", DataTypes.TEXT)
.withColumn("vreid", DataTypes.TEXT)
.withColumn("email", DataTypes.TEXT)
.withColumn("controlcode", DataTypes.TEXT)
.withColumn("status", DataTypes.TEXT)
.withColumn("timestamp", DataTypes.TIMESTAMP)
.withColumn("senderfullname", DataTypes.TEXT)
.withCompactStorage()
.build());
cqlSession.execute(SchemaBuilder.createIndex("sender")
.ifNotExists()
.onTable("Invites")
.andColumn("senderuserid")
.build());
_log.info("+ Table '{}' has been created (if needed).", "Invites");
}
private void createTableLikes(CqlSession cqlSession) {
cqlSession.execute(SchemaBuilder.createTable("Likes")
.ifNotExists()
.withPartitionKey("likeid", DataTypes.UUID)
.withColumn("userid", DataTypes.TEXT)
.withColumn("fullname", DataTypes.TEXT)
.withColumn("thumbnailurl", DataTypes.TEXT)
.withColumn("postid", DataTypes.UUID)
.withColumn("timestamp", DataTypes.TIMESTAMP)
.withCompactStorage()
.build());
cqlSession.execute(SchemaBuilder.createIndex("post_likes")
.ifNotExists()
.onTable("Likes")
.andColumn("postid")
.build());
_log.info("+ Table '{}' has been created (if needed).", "Likes");
}
private void createTableComments(CqlSession cqlSession) {
cqlSession.execute(SchemaBuilder.createTable("Comments")
.ifNotExists()
.withPartitionKey("commentid", DataTypes.UUID)
.withColumn("userid", DataTypes.TEXT)
.withColumn("fullname", DataTypes.TEXT)
.withColumn("thumbnailurl", DataTypes.TEXT)
.withColumn("comment", DataTypes.TEXT)
.withColumn("postid", DataTypes.UUID)
.withColumn("timestamp", DataTypes.TIMESTAMP)
.withColumn("isedit", DataTypes.BOOLEAN)
.withColumn("lastedittime", DataTypes.TIMESTAMP)
.withCompactStorage()
.build());
cqlSession.execute(SchemaBuilder.createIndex("post_comments")
.ifNotExists()
.onTable("Comments")
.andColumn("postid")
.build());
_log.info("+ Table '{}' has been created (if needed).", "Comments");
}
private void createTableNotifications(CqlSession cqlSession) {
cqlSession.execute(SchemaBuilder.createTable("Notifications")
.ifNotExists()
.withPartitionKey("notid", DataTypes.UUID)
.withColumn("type", DataTypes.TEXT)
.withColumn("userid", DataTypes.TEXT)
.withColumn("subjectid", DataTypes.TEXT)
.withColumn("timestamp", DataTypes.TIMESTAMP)
.withColumn("description", DataTypes.TEXT)
.withColumn("uri", DataTypes.TEXT)
.withColumn("senderid", DataTypes.TEXT)
.withColumn("senderfullname", DataTypes.TEXT)
.withColumn("senderthumbnailurl", DataTypes.TEXT)
.withColumn("isread", DataTypes.BOOLEAN)
.withCompactStorage()
.build());
cqlSession.execute(SchemaBuilder.createIndex("not_type")
.ifNotExists()
.onTable("Notifications")
.andColumn("type")
.build());
_log.info("+ Table '{}' has been created (if needed).", "Notifications");
}
private void createTablePosts(CqlSession cqlSession) {
cqlSession.execute(SchemaBuilder.createTable("Posts")
.ifNotExists()
.withPartitionKey("postid", DataTypes.UUID)
.withColumn("linkhost", DataTypes.TEXT)
.withColumn("description", DataTypes.TEXT)
.withColumn("email", DataTypes.TEXT)
.withColumn("likesno", DataTypes.BIGINT)
.withColumn("thumbnailurl", DataTypes.TEXT)
.withColumn("linkdescription", DataTypes.TEXT)
.withColumn("timestamp", DataTypes.TIMESTAMP)
.withColumn("uri", DataTypes.TEXT)
.withColumn("isapplicationpost", DataTypes.BOOLEAN)
.withColumn("entityid", DataTypes.TEXT)
.withColumn("privacy", DataTypes.TEXT)
.withColumn("type", DataTypes.TEXT)
.withColumn("urithumbnail", DataTypes.TEXT)
.withColumn("vreid", DataTypes.TEXT)
.withColumn("multifileupload", DataTypes.BOOLEAN)
.withColumn("fullname", DataTypes.TEXT)
.withColumn("commentsno", DataTypes.BIGINT)
.withColumn("linktitle", DataTypes.TEXT)
.withCompactStorage()
.build());
cqlSession.execute(SchemaBuilder.createIndex("posts_privacy")
.ifNotExists()
.onTable("Posts")
.andColumn("privacy")
.build());
_log.info("+ Table '{}' has been created (if needed).", "Posts");
}
}

2671
src/main/java/org/gcube/portal/databook/server/DBCassandraAstyanaxImpl.java
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File diff suppressed because it is too large Load Diff

55
src/main/java/org/gcube/portal/databook/server/RunningCluster.java
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@ -7,9 +7,14 @@ import java.io.File;
import java.io.FileInputStream; import java.io.FileInputStream;
import java.io.IOException; import java.io.IOException;
import java.io.Serializable; import java.io.Serializable;
import java.net.InetSocketAddress;
import java.util.ArrayList;
import java.util.List; import java.util.List;
import java.util.Properties; import java.util.Properties;
import com.datastax.oss.driver.api.core.CqlSession;
import com.datastax.oss.driver.api.core.metadata.Metadata;
import com.datastax.oss.driver.api.core.metadata.schema.KeyspaceMetadata;
import org.gcube.common.portal.GCubePortalConstants; import org.gcube.common.portal.GCubePortalConstants;
import org.gcube.common.portal.PortalContext; import org.gcube.common.portal.PortalContext;
import org.gcube.common.resources.gcore.ServiceEndpoint; import org.gcube.common.resources.gcore.ServiceEndpoint;
@ -22,8 +27,9 @@ import org.slf4j.Logger;
import org.slf4j.LoggerFactory; import org.slf4j.LoggerFactory;
/** /**
* @author Massimiliano Assante ISTI-CNR * @author Massimiliano Assante ISTI-CNR
* @author Ahmed Salah Tawfik Ibrahim ISTI-CNR
* *
* @version 0.1 Dec 2012 * @version 2.0.0 October 2023
* *
*/ */
@SuppressWarnings("serial") @SuppressWarnings("serial")
@ -38,7 +44,7 @@ public class RunningCluster implements Serializable {
*/ */
private static final String HOST_PROPERTY = "host"; private static final String HOST_PROPERTY = "host";
private static final String HOST_PORT_PROPERTY = "port"; private static final String HOST_PORT_PROPERTY = "port";
private static final String CLUSTER_NAME_PROPERTY = "cluster"; private static final String DATACENTER_NAME_PROPERTY = "datacenter";
private static final String KEY_SPACE_NAME_PROPERTY = "keyspace"; private static final String KEY_SPACE_NAME_PROPERTY = "keyspace";
/** /**
* other constants * other constants
@ -56,11 +62,11 @@ public class RunningCluster implements Serializable {
/** /**
* Cluster Name * Cluster Name
*/ */
private String clusterName; private String datacenterName;
/** /**
* Keyspace Name * Keyspace Name
*/ */
private String keyspaceName; private String keyspaceName; //to be modified
/** /**
* @param infrastructureName could be null * @param infrastructureName could be null
@ -76,8 +82,8 @@ public class RunningCluster implements Serializable {
* private constructor * private constructor
*/ */
private RunningCluster(String infrastructureName) { private RunningCluster(String infrastructureName) {
try { //Query the IS (for the future)
List<ServiceEndpoint> resources = getConfigurationFromIS(infrastructureName); /*List<ServiceEndpoint> resources = getConfigurationFromIS(infrastructureName);
if (resources.size() > 1) { if (resources.size() > 1) {
_log.error("Too many Runtime Resource having name " + RUNTIME_RESOURCE_NAME +" in this scope "); _log.error("Too many Runtime Resource having name " + RUNTIME_RESOURCE_NAME +" in this scope ");
throw new TooManyRunningClustersException("There exist more than 1 Runtime Resource in this scope having name " throw new TooManyRunningClustersException("There exist more than 1 Runtime Resource in this scope having name "
@ -97,8 +103,13 @@ public class RunningCluster implements Serializable {
} }
} catch (Exception e) { } catch (Exception e) {
e.printStackTrace(); e.printStackTrace();
}*/
host = "10.1.28.55:9042, 10.1.30.142:9042, 10.1.28.100:9042";
datacenterName = "1";
keyspaceName = "dev_mig_new_schema_test";
} }
}
/** /**
* *
* @return the * @return the
@ -125,6 +136,7 @@ public class RunningCluster implements Serializable {
} }
private String readInfrastructureName() { private String readInfrastructureName() {
Properties props = new Properties(); Properties props = new Properties();
try { try {
StringBuilder sb = new StringBuilder(getCatalinaHome()); StringBuilder sb = new StringBuilder(getCatalinaHome());
@ -153,7 +165,7 @@ public class RunningCluster implements Serializable {
try { try {
props.load(CassandraClusterConnection.class.getResourceAsStream(DEFAULT_CONFIGURATION)); props.load(CassandraClusterConnection.class.getResourceAsStream(DEFAULT_CONFIGURATION));
host = props.getProperty(HOST_PROPERTY) + ":" + props.getProperty(HOST_PORT_PROPERTY); host = props.getProperty(HOST_PROPERTY) + ":" + props.getProperty(HOST_PORT_PROPERTY);
clusterName = props.getProperty(CLUSTER_NAME_PROPERTY); datacenterName = props.getProperty(DATACENTER_NAME_PROPERTY);
keyspaceName = props.getProperty(KEY_SPACE_NAME_PROPERTY); keyspaceName = props.getProperty(KEY_SPACE_NAME_PROPERTY);
} catch (IOException e) { } catch (IOException e) {
e.printStackTrace(); e.printStackTrace();
@ -169,25 +181,19 @@ public class RunningCluster implements Serializable {
this.host = host; this.host = host;
} }
public String getClusterName() {
return clusterName;
}
public void setClusterName(String clusterName) {
this.clusterName = clusterName;
}
public String getKeyspaceName() { public String getKeyspaceName() {
return keyspaceName; return keyspaceName;
} }
public void setKeyspaceName(String keyspaceName) { public void setKeyspaceName(String keyspaceName) {
this.keyspaceName = keyspaceName; this.keyspaceName = keyspaceName;
} }
@Override @Override
public String toString() { public String toString() {
return "RunningCluster [host=" + host + ", clusterName=" + clusterName return "RunningCluster [host=" + host + ", datacenterName=" + datacenterName
+ ", keyspaceName=" + keyspaceName + "]"; + ", keyspaceName=" + keyspaceName + "]";
} }
/** /**
@ -197,4 +203,21 @@ public class RunningCluster implements Serializable {
private static String getCatalinaHome() { private static String getCatalinaHome() {
return (System.getenv("CATALINA_HOME").endsWith("/") ? System.getenv("CATALINA_HOME") : System.getenv("CATALINA_HOME")+"/"); return (System.getenv("CATALINA_HOME").endsWith("/") ? System.getenv("CATALINA_HOME") : System.getenv("CATALINA_HOME")+"/");
} }
public void setDatacenterName(String datacenterName){
this.datacenterName = datacenterName;
}
public String getDatacenterName() {
return datacenterName;
}
public List<InetSocketAddress> getHosts() {
List<InetSocketAddress> hosts = new ArrayList<>();
String [] ips = host.split(", ");
for (String ip: ips){
String[] ip_port = ip.split(":");
hosts.add(new InetSocketAddress(ip_port[0], Integer.parseInt(ip_port[1])));
}
return hosts;
}
} }

68
src/main/java/org/gcube/portal/databook/server/Schema.java Normal file
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@ -0,0 +1,68 @@
package org.gcube.portal.databook.server;
public class Schema {
//Tables
public static final String NOTIFICATIONS = "Notifications";
public static final String POSTS = "Posts";
public static final String COMMENTS = "Comments";
public static final String LIKES = "Likes";
public static final String INVITES = "Invites";
public static final String VRE_TIMELINE_POSTS = "VRETimeline";
public static final String USER_TIMELINE_POSTS = "UserTimeline";
public static final String APP_TIMELINE_POSTS = "AppTimeline";
public static final String USER_LIKED_POSTS = "UserLikes";
public static final String USER_NOTIFICATIONS = "UserNotifications"; // regular user notifications timeline (both read and unread, messages are included)
public static final String USER_NOTIFICATIONS_UNREAD = "UserUnreadNotifications"; // only unread user notifications/ notifications messages
public static final String USER_NOTIFICATIONS_PREFERENCES = "UserNotificationsPreferences"; // preferences for notifications
public static final String HASHTAGS_COUNTER = "HashtagsCounter"; // count the hashtags per group and type
public static final String HASHTAGGED_POSTS = "HashtaggedPosts"; // contains hashtags per type associated with vre and POST
public static final String HASHTAGGED_COMMENTS = "HashtaggedComments"; // contains hashtags per type associated with vre and comment
public static final String VRE_INVITES = "VREInvites"; //contains the emails that were invited per VRE
public static final String EMAIL_INVITES = "EmailInvites"; //contains the list of invitation per email
public static final String ATTACHMENTS = "Attachments"; //contains the list of all the attachments in a POST
//columns
public static final String USER_ID = "userid"; //text
public static final String TYPE = "type"; //text
public static final String PREFERENCE = "preference"; //text
public static final String TIMESTAMP = "timestamp"; //timestamp
public static final String NOT_ID = "notid"; //UUID
public static final String VRE_ID = "vreid"; //text
public static final String POST_ID = "postid"; //UUID
public static final String APP_ID = "appid"; //text
public static final String HASHTAG = "hashtag"; //text
public static final String COMMENT_ID = "commentid"; //UUID
public static final String COUNT = "count"; //big int
public static final String LIKE_ID = "likeid"; //UUID
public static final String INVITE_ID = "inviteid"; //UUID
public static final String STATUS = "status"; //text
public static final String EMAIL = "email"; //text
public static final String ATTACH_ID = "attachid"; //UUID
public static final String URI = "uri"; //text
public static final String NAME = "name"; //text
public static final String DESCRIPTION = "description"; //text
public static final String URI_THUMBNAIL = "urithumbnail"; //text
public static final String MIME_TYPE = "mimetype"; //text
public static final String SENDER_USER_ID = "senderuserid"; //text
public static final String CONTROL_CODE = "controlcode"; //text
public static final String SENDER_FULL_NAME = "senderfullname"; //text
public static final String FULL_NAME = "fullname"; //text
public static final String THUMBNAIL_URL = "thumbnailurl"; //text
public static final String COMMENT = "comment"; //text
public static final String IS_EDIT = "isedit"; //bool
public static final String LAST_EDIT_TIME = "lastedittime"; //timestamp
public static final String SUBJECT_ID = "subjectid"; //text
public static final String SENDER_ID = "senderid"; //text
public static final String SENDER_THUMBNAIL_URL = "senderthumbnailurl"; //text
public static final String IS_READ = "isread"; //bool
public static final String LINK_HOST = "linkhost"; //text
public static final String LIKES_NO = "likesno"; //big int
public static final String LINK_DESCRIPTION = "linkdescription"; //text
public static final String IS_APPLICATION_POST = "isapplicationpost"; //bool -->
public static final String ENTITY_ID = "entityid"; //text
public static final String PRIVACY = "privacy"; //text
public static final String MULTI_FILE_UPLOAD = "multifileupload"; //bool
public static final String COMMENTS_NO = "commentsno"; //big int
public static final String LINK_TITLE = "linktitle"; //text
}