/*
* Copyright 2012-2014 Aerospike, Inc.
*
* Portions may be licensed to Aerospike, Inc. under one or more contributor
* license agreements.
*
* 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.aerospike.client.command;
import java.io.IOException;
import com.aerospike.client.AerospikeException;
import com.aerospike.client.Key;
import com.aerospike.client.ResultCode;
import com.aerospike.client.cluster.Cluster;
import com.aerospike.client.cluster.Connection;
import com.aerospike.client.policy.Policy;
public final class ExistsCommand extends SingleCommand {
private final Policy policy;
private boolean exists;
public ExistsCommand(Cluster cluster, Policy policy, Key key) {
super(cluster, key);
this.policy = (policy == null) ? new Policy() : policy;
}
@Override
protected Policy getPolicy() {
return policy;
}
@Override
protected void writeBuffer() throws AerospikeException {
setExists(key);
}
protected void parseResult(Connection conn) throws AerospikeException, IOException {
// Read header.
conn.readFully(dataBuffer, MSG_TOTAL_HEADER_SIZE);
int resultCode = dataBuffer[13] & 0xFF;
if (resultCode != 0 && resultCode != ResultCode.KEY_NOT_FOUND_ERROR) {
throw new AerospikeException(resultCode);
}
exists = resultCode == 0;
emptySocket(conn);
}
public boolean exists() {
return exists;
}
}