150 lines
4.9 KiB
Java
150 lines
4.9 KiB
Java
package org.gcube.contentmanager.storageserver.data;
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import java.util.Arrays;
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import java.util.List;
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import com.mongodb.BasicDBObject;
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import com.mongodb.Bytes;
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import com.mongodb.DB;
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import com.mongodb.DBCollection;
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import com.mongodb.DBCursor;
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import com.mongodb.DBObject;
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import com.mongodb.MongoClient;
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import com.mongodb.MongoClientOptions;
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import com.mongodb.MongoCredential;
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import com.mongodb.ReadPreference;
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import com.mongodb.ServerAddress;
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import org.bson.types.BSONTimestamp;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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public class ReadingMongoOplog extends Thread{
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public static final String DBNAME="remotefs";
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public static final String LOCAL_COLLECTION="oplog.rs";
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public static final String LOCAL_DB="local";
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protected static ReadPreference READ_PREFERENCE=ReadPreference.secondaryPreferred();
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final static Logger logger=LoggerFactory.getLogger(ReadingMongoOplog.class);
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private ServerAddress[] server;
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private MongoClient mongoClient;
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private DB local;
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private DBCollection oplog;
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private CubbyHole c1;
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private CubbyHole c2;
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private String user;
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private String password;
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private int number;
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private List<String> srvs;
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public ReadingMongoOplog(List<String> srvs, CubbyHole c1, CubbyHole c2, int numberT){
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this.c1=c1;
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this.c2=c2;
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this.number=numberT;
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this.srvs=srvs;
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setupServerAddress(srvs);
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initBackend();
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}
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public ReadingMongoOplog(List<String> srvs, String user,
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String password, CubbyHole c1, CubbyHole c2, int numberT) {
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this.c1=c1;
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this.c2=c2;
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this.number=numberT;
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this.user=user;
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this.password=password;
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setupServerAddress(srvs);
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initBackend();
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}
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public void run() {
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// check oplog collection
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DBCursor lastCursor = oplog.find().sort(new BasicDBObject("$natural", -1)).limit(1);
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if (!lastCursor.hasNext()) {
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logger.error("no oplog!");
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return;
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}
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DBObject last = lastCursor.next();
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BSONTimestamp ts = (BSONTimestamp) last.get("ts");
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while (true) {
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logger.debug("Sniffing is starting at ts: " + ts);
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DBCursor cursor = oplog.find(new BasicDBObject("ts", new BasicDBObject("$gt", ts)));
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cursor.addOption(Bytes.QUERYOPTION_TAILABLE);
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cursor.addOption(Bytes.QUERYOPTION_AWAITDATA);
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cursor.addOption(Bytes.QUERYOPTION_NOTIMEOUT);
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while (cursor.hasNext()) {
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try{
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DBObject x = cursor.next();
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logger.debug("oplog current object: "+x);
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ts = (BSONTimestamp) x.get("ts");
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String ns=(String)x.get("ns");
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// check if discard or process the current DB record
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if((x.get("o2") != null) || (ns.equalsIgnoreCase(DBNAME+".fs.files"))){
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if(x.containsField("o")){ // add check on operation type
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// c1 buffer for suer accounting
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c1.put(x);
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// c2 buffer for folder accounting (TODO)
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if(c2 !=null)
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c2.put(x);
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// parser.runWithoutThread(x);
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}else{
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logger.debug("operation is not accounted");
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}
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}else{
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logger.debug("object discarded ");
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}
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}catch(Exception e){
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logger.error("Exception throws: "+e.getMessage());
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e.printStackTrace();
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}
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logger.debug("...waiting new object... ");
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}
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logger.warn("out of the cycle ");
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}
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}
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// @SuppressWarnings("deprecation")
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private void initBackend() {
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MongoClientOptions options=MongoClientOptions.builder().readPreference(READ_PREFERENCE).build();
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try {
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Thread.sleep(1000);
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} catch (InterruptedException e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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}
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boolean auth =false;
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logger.info("try to auth ");
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if(user!=null && password !=null){
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MongoCredential credential = MongoCredential.createMongoCRCredential(user, "admin", password.toCharArray());
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logger.debug("try to connect to mongo with authentication... ");
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mongoClient = new MongoClient(Arrays.asList(server), Arrays.asList(credential), options);//"146.48.123.71"
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}else{
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logger.debug("try to connect to mongo... ");
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mongoClient = new MongoClient(Arrays.asList(server));
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}
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logger.debug("authenticated. ");
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logger.debug("try to connect to local db...");
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local = mongoClient.getDB(LOCAL_DB);
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logger.debug("db connected ");
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oplog = local.getCollection(LOCAL_COLLECTION);
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}
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private void setupServerAddress(List<String> srvs) {
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if(srvs.size() > 0){
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server=new ServerAddress[srvs.size()];
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int i=0;
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for(String s : srvs){
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server[i]=new ServerAddress(s);
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i++;
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}
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}else{
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logger.error("MongoDB server not set. Please set one or more servers");
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throw new RuntimeException("MongoDB server not set. Please set one or more servers");
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}
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}
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}
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