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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.curator.mock;
import com.yahoo.component.annotation.Inject;
import com.yahoo.path.Path;
import com.yahoo.vespa.curator.Curator;
import org.apache.curator.framework.recipes.atomic.DistributedAtomicLong;
import org.apache.curator.framework.recipes.locks.InterProcessLock;
import java.time.Duration;
import java.util.Optional;
import java.util.concurrent.ExecutorService;
/**
* <p>A <b>non thread safe</b> mock of the curator API.
* The methods are implemented lazily, due to laziness.
* You may trigger an UnsupportedOperationException, and in some cases a NullPointerException in using
* this, which means additional functionality is needed.
* Due to the "fluent API" style of Curator managing to break JavaDoc at a fundamental level, there is no
* documentation on the contract of each method. The behavior here is deduced by observing what using code exists
* and peeking at the Curator code. It may be incorrect in some corner cases.</p>
*
* <p>Contains some code from PathUtils in ZooKeeper, licensed under the Apache 2.0 license.</p>
*
* @author bratseth
*/
public class MockCurator extends Curator {
private String zooKeeperEnsembleConnectionSpec = "";
/** Creates a mock curator with stable ordering */
@Inject
public MockCurator() {
this(true);
}
/**
* Creates a mock curator
*
* @param stableOrdering if true children of a node are returned in the same order each time they are queried.
* This is not what ZooKeeper does.
*/
public MockCurator(boolean stableOrdering) {
super("host1:2181", "host1:2181", (retryPolicy) -> new MockCuratorFramework(stableOrdering, false));
}
private MockCuratorFramework mockFramework() {
return (MockCuratorFramework) super.framework();
}
/**
* Lists the entire content of this curator instance as a multiline string.
* Useful for debugging.
*/
public String dumpState() { return mockFramework().fileSystem().dumpState(); }
/** Returns an atomic counter in this, or empty if no such counter is created */
public Optional<DistributedAtomicLong> counter(String path) {
return Optional.ofNullable(mockFramework().atomicCounters().get(path));
}
/**
* Sets the ZooKeeper ensemble connection spec, which must be on the form
* host1:port,host2:port ...
*/
public void setZooKeeperEnsembleConnectionSpec(String ensembleSpec) {
this.zooKeeperEnsembleConnectionSpec = ensembleSpec;
}
@Override
public String zooKeeperEnsembleConnectionSpec() {
return zooKeeperEnsembleConnectionSpec;
}
@Override
public DistributedAtomicLong createAtomicCounter(String path) {
return mockFramework().createAtomicCounter(path);
}
@Override
public InterProcessLock createMutex(String path) {
return mockFramework().createMutex(path);
}
@Override
public CompletionWaiter getCompletionWaiter(Path barrierPath, String id, Duration waitForAll) {
return mockFramework().createCompletionWaiter();
}
@Override
public CompletionWaiter createCompletionWaiter(Path barrierPath, String id, Duration waitForAll) {
return mockFramework().createCompletionWaiter();
}
@Override
public DirectoryCache createDirectoryCache(String path, boolean cacheData, boolean dataIsCompressed, ExecutorService executorService) {
return mockFramework().createDirectoryCache(path);
}
@Override
public FileCache createFileCache(String path, boolean dataIsCompressed) {
return mockFramework().createFileCache(path);
}
@Override
public int zooKeeperEnsembleCount() { return 1; }
}
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