com.hazelcast.cp.internal.datastructures.lock.operation.TryLockOp Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2020, Hazelcast, Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hazelcast.cp.internal.datastructures.lock.operation;
import com.hazelcast.cp.CPGroupId;
import com.hazelcast.cp.internal.CallerAware;
import com.hazelcast.cp.internal.IndeterminateOperationStateAware;
import com.hazelcast.cp.internal.datastructures.lock.AcquireResult;
import com.hazelcast.cp.internal.datastructures.lock.Lock;
import com.hazelcast.cp.internal.datastructures.lock.LockInvocationKey;
import com.hazelcast.cp.internal.datastructures.lock.LockDataSerializerHook;
import com.hazelcast.cp.internal.datastructures.lock.LockService;
import com.hazelcast.cp.internal.raft.impl.util.PostponedResponse;
import com.hazelcast.cp.lock.FencedLock;
import com.hazelcast.cluster.Address;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import java.io.IOException;
import java.util.UUID;
import static com.hazelcast.cp.internal.datastructures.lock.AcquireResult.AcquireStatus.WAIT_KEY_ADDED;
/**
* Operation for {@link FencedLock#lock()}
*
* @see Lock#acquire(LockInvocationKey, boolean)
*/
public class TryLockOp extends AbstractLockOp implements CallerAware, IndeterminateOperationStateAware {
private long timeoutMs;
private Address callerAddress;
private long callId;
public TryLockOp() {
}
public TryLockOp(String name, long sessionId, long threadId, UUID invUid, long timeoutMs) {
super(name, sessionId, threadId, invUid);
this.timeoutMs = timeoutMs;
}
@Override
public Object run(CPGroupId groupId, long commitIndex) {
LockService service = getService();
LockInvocationKey key = new LockInvocationKey(commitIndex, invocationUid, callerAddress, callId, getLockEndpoint());
AcquireResult result = service.acquire(groupId, name, key, timeoutMs);
if (result.status() == WAIT_KEY_ADDED) {
return PostponedResponse.INSTANCE;
}
// SUCCESSFUL or FAILED
return result.fence();
}
@Override
public void setCaller(Address callerAddress, long callId) {
this.callerAddress = callerAddress;
this.callId = callId;
}
@Override
public boolean isRetryableOnIndeterminateOperationState() {
return true;
}
@Override
public void writeData(ObjectDataOutput out) throws IOException {
super.writeData(out);
out.writeLong(timeoutMs);
out.writeObject(callerAddress);
out.writeLong(callId);
}
@Override
public void readData(ObjectDataInput in) throws IOException {
super.readData(in);
timeoutMs = in.readLong();
callerAddress = in.readObject();
callId = in.readLong();
}
@Override
public int getClassId() {
return LockDataSerializerHook.TRY_LOCK_OP;
}
@Override
protected void toString(StringBuilder sb) {
super.toString(sb);
sb.append(", timeoutMs=").append(timeoutMs);
sb.append(", callerAddress=").append(callerAddress);
sb.append(", callId=").append(callId);
}
}