/
PNCounterGetMessageTask.java
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/
PNCounterGetMessageTask.java
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/*
* Copyright (c) 2008-2019, 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.client.impl.protocol.task.crdt.pncounter;
import com.hazelcast.client.impl.protocol.ClientMessage;
import com.hazelcast.client.impl.protocol.codec.PNCounterGetCodec;
import com.hazelcast.client.impl.protocol.codec.PNCounterGetCodec.RequestParameters;
import com.hazelcast.client.impl.protocol.task.AbstractAddressMessageTask;
import com.hazelcast.cluster.impl.VectorClock;
import com.hazelcast.config.PNCounterConfig;
import com.hazelcast.crdt.pncounter.PNCounter;
import com.hazelcast.internal.crdt.pncounter.PNCounterService;
import com.hazelcast.internal.crdt.pncounter.operations.CRDTTimestampedLong;
import com.hazelcast.internal.crdt.pncounter.operations.GetOperation;
import com.hazelcast.instance.impl.Node;
import com.hazelcast.nio.Address;
import com.hazelcast.nio.Connection;
import com.hazelcast.security.permission.ActionConstants;
import com.hazelcast.security.permission.PNCounterPermission;
import com.hazelcast.spi.impl.operationservice.Operation;
import java.security.Permission;
import java.util.Map.Entry;
/**
* Task responsible for processing client messages for retrieving the
* current {@link PNCounter} state.
* If this message was sent from a client with smart routing disabled, the
* member may forward the request to a different target member.
*/
public class PNCounterGetMessageTask extends AbstractAddressMessageTask<RequestParameters> {
public PNCounterGetMessageTask(ClientMessage clientMessage, Node node, Connection connection) {
super(clientMessage, node, connection);
}
@Override
protected Address getAddress() {
return parameters.targetReplica;
}
@Override
protected Operation prepareOperation() {
final VectorClock vectorClock = new VectorClock();
if (parameters.replicaTimestamps != null) {
for (Entry<String, Long> timestamp : parameters.replicaTimestamps) {
vectorClock.setReplicaTimestamp(timestamp.getKey(), timestamp.getValue());
}
}
return new GetOperation(parameters.name, vectorClock);
}
@Override
protected PNCounterGetCodec.RequestParameters decodeClientMessage(ClientMessage clientMessage) {
parameters = PNCounterGetCodec.decodeRequest(clientMessage);
parameters.targetReplica = clientEngine.memberAddressOf(parameters.targetReplica);
return parameters;
}
@Override
protected ClientMessage encodeResponse(Object response) {
final CRDTTimestampedLong resp = (CRDTTimestampedLong) response;
final PNCounterConfig counterConfig = nodeEngine.getConfig().findPNCounterConfig(parameters.name);
return PNCounterGetCodec.encodeResponse(
resp.getValue(), resp.getVectorClock().entrySet(), counterConfig.getReplicaCount());
}
@Override
public String getServiceName() {
return PNCounterService.SERVICE_NAME;
}
public Object[] getParameters() {
return null;
}
@Override
public Permission getRequiredPermission() {
return new PNCounterPermission(parameters.name, ActionConstants.ACTION_READ);
}
@Override
public String getMethodName() {
return "get";
}
@Override
public String getDistributedObjectName() {
return parameters.name;
}
}