Examples with IReplicationManager org.apache.asterix.common.replication.IReplicationManager used on opensource projects

Example 1 with IReplicationManager

use of org.apache.asterix.common.replication.IReplicationManager in project asterixdb by apache.

the class StartReplicationServiceTask method perform.

@Override
public void perform(IControllerService cs) throws HyracksDataException {
    INcApplicationContext appContext = (INcApplicationContext) cs.getApplicationContext();
    try {
        //Open replication channel
        appContext.getReplicationChannel().start();
        final IReplicationManager replicationManager = appContext.getReplicationManager();
        //Check the state of remote replicas
        replicationManager.initializeReplicasState();
        //Start replication after the state of remote replicas has been initialized.
        replicationManager.startReplicationThreads();
    } catch (Exception e) {
        throw HyracksDataException.create(e);
    }
}

Example 2 with IReplicationManager

use of org.apache.asterix.common.replication.IReplicationManager in project asterixdb by apache.

the class ReplicationCheckpointManager method tryCheckpoint.

/***
     * Attempts to perform a soft checkpoint at the specified {@code checkpointTargetLSN}.
     * If a checkpoint cannot be captured due to datasets having LSN < {@code checkpointTargetLSN},
     * an asynchronous flush is triggered on them. If the checkpoint fails due to a replica index,
     * a request is sent to the primary replica of the index to flush it.
     * When a checkpoint is successful, all transaction log files that end with
     * LSN < {@code checkpointTargetLSN} are deleted.
     */
@Override
public synchronized long tryCheckpoint(long checkpointTargetLSN) throws HyracksDataException {
    LOGGER.info("Attemping soft checkpoint...");
    final long minFirstLSN = txnSubsystem.getRecoveryManager().getMinFirstLSN();
    boolean checkpointSucceeded = minFirstLSN >= checkpointTargetLSN;
    if (!checkpointSucceeded) {
        // Flush datasets with indexes behind target checkpoint LSN
        final IDatasetLifecycleManager datasetLifecycleManager = txnSubsystem.getAsterixAppRuntimeContextProvider().getDatasetLifecycleManager();
        datasetLifecycleManager.scheduleAsyncFlushForLaggingDatasets(checkpointTargetLSN);
        // Request remote replicas to flush lagging indexes
        final IReplicationManager replicationManager = txnSubsystem.getAsterixAppRuntimeContextProvider().getAppContext().getReplicationManager();
        try {
            replicationManager.requestFlushLaggingReplicaIndexes(checkpointTargetLSN);
        } catch (IOException e) {
            throw new HyracksDataException(e);
        }
    }
    capture(minFirstLSN, false);
    if (checkpointSucceeded) {
        txnSubsystem.getLogManager().deleteOldLogFiles(minFirstLSN);
        LOGGER.info(String.format("soft checkpoint succeeded with at LSN(%s)", minFirstLSN));
    }
    return minFirstLSN;
}