org.apache.flink.runtime.highavailability.nonha.AbstractNonHaServices Maven / Gradle / Ivy
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* to you under the Apache License, Version 2.0 (the
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*
* http://www.apache.org/licenses/LICENSE-2.0
*
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package org.apache.flink.runtime.highavailability.nonha;
import org.apache.flink.runtime.blob.BlobStore;
import org.apache.flink.runtime.blob.VoidBlobStore;
import org.apache.flink.runtime.checkpoint.CheckpointRecoveryFactory;
import org.apache.flink.runtime.checkpoint.StandaloneCheckpointRecoveryFactory;
import org.apache.flink.runtime.highavailability.HighAvailabilityServices;
import org.apache.flink.runtime.highavailability.RunningJobsRegistry;
import org.apache.flink.runtime.highavailability.nonha.standalone.StandaloneRunningJobsRegistry;
import org.apache.flink.runtime.jobmanager.StandaloneSubmittedJobGraphStore;
import org.apache.flink.runtime.jobmanager.SubmittedJobGraphStore;
import javax.annotation.concurrent.GuardedBy;
import java.io.IOException;
import static org.apache.flink.util.Preconditions.checkState;
/**
* Abstract base class for non high-availability services.
*
* This class returns the standalone variants for the checkpoint recovery factory, the submitted
* job graph store, the running jobs registry and the blob store.
*/
public abstract class AbstractNonHaServices implements HighAvailabilityServices {
protected final Object lock = new Object();
private final RunningJobsRegistry runningJobsRegistry;
private final VoidBlobStore voidBlobStore;
private boolean shutdown;
public AbstractNonHaServices() {
this.runningJobsRegistry = new StandaloneRunningJobsRegistry();
this.voidBlobStore = new VoidBlobStore();
shutdown = false;
}
// ----------------------------------------------------------------------
// HighAvailabilityServices method implementations
// ----------------------------------------------------------------------
@Override
public CheckpointRecoveryFactory getCheckpointRecoveryFactory() {
synchronized (lock) {
checkNotShutdown();
return new StandaloneCheckpointRecoveryFactory();
}
}
@Override
public SubmittedJobGraphStore getSubmittedJobGraphStore() throws Exception {
synchronized (lock) {
checkNotShutdown();
return new StandaloneSubmittedJobGraphStore();
}
}
@Override
public RunningJobsRegistry getRunningJobsRegistry() throws Exception {
synchronized (lock) {
checkNotShutdown();
return runningJobsRegistry;
}
}
@Override
public BlobStore createBlobStore() throws IOException {
synchronized (lock) {
checkNotShutdown();
return voidBlobStore;
}
}
@Override
public void close() throws Exception {
synchronized (lock) {
if (!shutdown) {
shutdown = true;
}
}
}
@Override
public void closeAndCleanupAllData() throws Exception {
// this stores no data, so this method is the same as 'close()'
close();
}
// ----------------------------------------------------------------------
// Helper methods
// ----------------------------------------------------------------------
@GuardedBy("lock")
protected void checkNotShutdown() {
checkState(!shutdown, "high availability services are shut down");
}
protected boolean isShutDown() {
return shutdown;
}
}