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UrlsController
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Code Issues Pull Requests Releases 10 Wiki Activity

- Improve exception handling. 

- Code polishing.
This commit is contained in:
Lampros Smyrnaios 2022-12-07 13:48:00 +02:00
parent f183df276b
commit 8607594f6d
4 changed files with 44 additions and 36 deletions
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2
build.gradle
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@ -106,7 +106,7 @@ dependencies {
// https://mvnrepository.com/artifact/org.json/json
implementation 'org.json:json:20220924'
testImplementation group: 'org.springframework.security', name: 'spring-security-test'
testImplementation 'org.springframework.security:spring-security-test'
testImplementation "org.springframework.boot:spring-boot-starter-test"
}

63
src/main/java/eu/openaire/urls_controller/controllers/UrlController.java
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@ -113,32 +113,14 @@ public class UrlController {
// The "order by" in the end makes sure the older attempted records will be re-attempted after a long time.
//logger.debug(findAssignmentsQuery); // DEBUG!
String createCurrentAssignmentsQuery = "create table " + ImpalaConnector.databaseName + ".current_assignment as \n" + findAssignmentsQuery;
String computeCurrentAssignmentsStatsQuery = "COMPUTE STATS " + ImpalaConnector.databaseName + ".current_assignment";
String getAssignmentsQuery = "select * from " + ImpalaConnector.databaseName + ".current_assignment";
List<Assignment> assignments = new ArrayList<>(assignmentsLimit);
ImpalaConnector.databaseLock.lock();
try {
jdbcTemplate.execute(createCurrentAssignmentsQuery);
} catch (Exception e) {
String errorMsg = ImpalaConnector.handleQueryException("createCurrentAssignmentsQuery", createCurrentAssignmentsQuery, e);
String tmpErrMsg = dropCurrentAssignmentTable(); // The table may be partially created, e.g. in case of an "out of memory" error in the database-server, during the creation, resulting in an empty table (yes it has happened).
if ( tmpErrMsg != null )
errorMsg += "\n" + tmpErrMsg;
ImpalaConnector.databaseLock.unlock();
return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(errorMsg);
}
try {
jdbcTemplate.execute(computeCurrentAssignmentsStatsQuery);
} catch (Exception e) {
String errorMsg = ImpalaConnector.handleQueryException("computeCurrentAssignmentsStatsQuery", computeCurrentAssignmentsStatsQuery, e);
String tmpErrMsg = dropCurrentAssignmentTable();
if ( tmpErrMsg != null )
errorMsg += "\n" + tmpErrMsg;
String errorMsg = createAndInitializeCurrentAssignmentsTable(findAssignmentsQuery);
if ( errorMsg != null ) {
ImpalaConnector.databaseLock.unlock();
return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(errorMsg);
}
@ -164,7 +146,7 @@ public class UrlController {
assignments.add(assignment);
});
} catch (Exception e) {
String errorMsg = ImpalaConnector.handleQueryException("getAssignmentsQuery", getAssignmentsQuery, e);
errorMsg = ImpalaConnector.handleQueryException("getAssignmentsQuery", getAssignmentsQuery, e);
String tmpErrMsg = dropCurrentAssignmentTable();
if ( tmpErrMsg != null )
errorMsg += "\n" + tmpErrMsg;
@ -174,7 +156,7 @@ public class UrlController {
int assignmentsSize = assignments.size();
if ( assignmentsSize == 0 ) {
String errorMsg = "No results retrieved from the \"findAssignmentsQuery\" for worker with id: " + workerId + ". Will increase the \"maxAttempts\" to " + maxAttemptsPerRecordAtomic.incrementAndGet() + " for the next requests.";
errorMsg = "No results retrieved from the \"findAssignmentsQuery\" for worker with id: " + workerId + ". Will increase the \"maxAttempts\" to " + maxAttemptsPerRecordAtomic.incrementAndGet() + " for the next requests.";
logger.error(errorMsg);
String tmpErrMsg = dropCurrentAssignmentTable();
ImpalaConnector.databaseLock.unlock();
@ -196,7 +178,7 @@ public class UrlController {
try {
jdbcTemplate.execute(insertAssignmentsQuery);
} catch (Exception e) {
String errorMsg = ImpalaConnector.handleQueryException("insertAssignmentsQuery", insertAssignmentsQuery, e);
errorMsg = ImpalaConnector.handleQueryException("insertAssignmentsQuery", insertAssignmentsQuery, e);
String tmpErrMsg = dropCurrentAssignmentTable();
if ( tmpErrMsg != null )
errorMsg += "\n" + tmpErrMsg;
@ -204,7 +186,7 @@ public class UrlController {
return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(errorMsg);
}
String errorMsg = dropCurrentAssignmentTable();
errorMsg = dropCurrentAssignmentTable();
if ( errorMsg != null ) {
ImpalaConnector.databaseLock.unlock();
return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(errorMsg);
@ -300,9 +282,6 @@ public class UrlController {
// Load all the parquet files of each type into its table.
ImpalaConnector.databaseLock.lock();
// Important note: It may be possible for a thread to acquire the lock and load its own and another thread's data into the table.
// So when the other thread acquire the lock, it will load ZERO data.
// That's ok, and we do not need to add any check if the remote data exist, since this process happens in milliseconds. (so a few milliseconds will be wasted for no data)
errorMsgAttempts = parquetFileUtils.loadParquetDataIntoTable(parquetFileUtils.parquetHDFSDirectoryPathAttempts, "attempt");
errorMsgPayloads = parquetFileUtils.loadParquetDataIntoTable(parquetFileUtils.parquetHDFSDirectoryPathPayloads, "payload");
ImpalaConnector.databaseLock.unlock();
@ -351,7 +330,7 @@ public class UrlController {
}
}
// This will delete the rows of the "assignment" table which refer to the curWorkerId. As we have non-kudu Impala tables, the Delete operation can only succeed through a "merge" operation of the rest of the data.
// This will delete the rows of the "assignment" table which refer to the "curWorkerId". As we have non-KUDU Impala tables, the Delete operation can only succeed through a "merge" operation of the rest of the data.
// Only the rows referring to OTHER workerIDs get stored in a temp-table, while the "assignment" table gets deleted. Then, the temp_table becomes the "assignment" table.
// We don't need to keep the assignment-info anymore, the "findAssignmentsQuery" checks the payload table for previously handled tasks.
mergeErrorMsg = fileUtils.mergeParquetFiles("assignment", " WHERE workerid != ", curWorkerId);
@ -370,6 +349,34 @@ public class UrlController {
}
private String createAndInitializeCurrentAssignmentsTable(String findAssignmentsQuery)
{
String createCurrentAssignmentsQuery = "create table " + ImpalaConnector.databaseName + ".current_assignment as \n" + findAssignmentsQuery;
String computeCurrentAssignmentsStatsQuery = "COMPUTE STATS " + ImpalaConnector.databaseName + ".current_assignment";
try {
jdbcTemplate.execute(createCurrentAssignmentsQuery);
} catch (Exception e) {
String errorMsg = ImpalaConnector.handleQueryException("createCurrentAssignmentsQuery", createCurrentAssignmentsQuery, e);
String tmpErrMsg = dropCurrentAssignmentTable(); // The table may be partially created, e.g. in case of an "out of memory" error in the database-server, during the creation, resulting in an empty table (yes it has happened).
if ( tmpErrMsg != null )
errorMsg += "\n" + tmpErrMsg;
return errorMsg;
}
try {
jdbcTemplate.execute(computeCurrentAssignmentsStatsQuery);
} catch (Exception e) {
String errorMsg = ImpalaConnector.handleQueryException("computeCurrentAssignmentsStatsQuery", computeCurrentAssignmentsStatsQuery, e);
String tmpErrMsg = dropCurrentAssignmentTable();
if ( tmpErrMsg != null )
errorMsg += "\n" + tmpErrMsg;
return errorMsg;
}
return null; // All good.
}
private String dropCurrentAssignmentTable() {
String dropCurrentAssignmentsQuery = "DROP TABLE IF EXISTS " + ImpalaConnector.databaseName + ".current_assignment PURGE";
try {

5
src/main/java/eu/openaire/urls_controller/util/FileUnZipper.java
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@ -1,7 +1,5 @@
package eu.openaire.urls_controller.util;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import java.io.File;
@ -15,11 +13,10 @@ import java.util.zip.ZipInputStream;
@Component
public class FileUnZipper {
private static final Logger logger = LoggerFactory.getLogger(FileUnZipper.class);
public void unzipFolder(Path source, Path target) throws Exception {
try ( ZipInputStream zis = new ZipInputStream(Files.newInputStream(source.toFile().toPath())) ) {
// Iterate over the files in zip and un-zip them.
// Iterate over the files in zip and unzip them.
ZipEntry zipEntry = zis.getNextEntry();
while ( zipEntry != null ) {
Path targetPath = zipSlipProtect(zipEntry, target);

10
src/main/java/eu/openaire/urls_controller/util/FileUtils.java
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@ -114,7 +114,7 @@ public class FileUtils {
String getFileLocationForHashQuery = "select `location` from " + ImpalaConnector.databaseName + ".payload where `hash` = ? limit 1" ;
final int[] hashArgType = new int[] {Types.VARCHAR};
ImpalaConnector.databaseLock.lock();
ImpalaConnector.databaseLock.lock(); // The following loop uses the database.
for ( UrlReport urlReport : urlReports )
{
@ -230,7 +230,7 @@ public class FileUtils {
fileUnZipper.unzipFolder(Paths.get(zipFileFullPath), curBatchPath);
String[] fileNames = new File(targetDirectory).list();
if ( (fileNames == null) || (fileNames.length <= 1) ) { // The directory might have only one file, the "zip-file".
if ( (fileNames == null) || (fileNames.length <= 1) ) { // The directory might have only one file, the "zip-file", if the full-texts failed to be unzipped..
logger.error("No full-text fileNames where extracted from directory: " + targetDirectory);
failedBatches ++;
continue; // To the next batch.
@ -489,13 +489,17 @@ public class FileUtils {
}
public boolean deleteDirectory(File curBatchDir) {
public boolean deleteDirectory(File curBatchDir)
{
try {
org.apache.commons.io.FileUtils.deleteDirectory(curBatchDir);
return true;
} catch (IOException e) {
logger.error("The following directory could not be deleted: " + curBatchDir.getName(), e);
return false;
} catch (IllegalArgumentException iae) {
logger.error("This batch-dir does not exist: " + curBatchDir.getName());
return false;
}
}