/*
*
* * Copyright 2014 Orient Technologies LTD (info(at)orientechnologies.com)
* *
* * 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.
* *
* * For more information: http://www.orientechnologies.com
*
*/
package com.orientechnologies.orient.server.distributed.task;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx;
import com.orientechnologies.orient.core.id.ORecordId;
import com.orientechnologies.orient.core.record.ORecord;
import com.orientechnologies.orient.core.storage.ORawBuffer;
import com.orientechnologies.orient.server.OServer;
import com.orientechnologies.orient.server.distributed.ODistributedServerManager;
/**
* Execute a read of a record from a distributed node.
*
* @author Luca Garulli (l.garulli--at--orientechnologies.com)
*
*/
public class OReadRecordTask extends OAbstractRemoteTask {
private static final long serialVersionUID = 1L;
protected ORecordId rid;
public OReadRecordTask() {
}
public OReadRecordTask(final ORecordId iRid) {
rid = iRid;
}
@Override
public Object execute(final OServer iServer, ODistributedServerManager iManager, final ODatabaseDocumentTx database)
throws Exception {
final ORecord record = database.load(rid);
if (record == null)
return null;
return new ORawBuffer(record);
}
@Override
public void writeExternal(final ObjectOutput out) throws IOException {
out.writeUTF(rid.toString());
}
@Override
public void readExternal(final ObjectInput in) throws IOException, ClassNotFoundException {
rid = new ORecordId(in.readUTF());
}
public QUORUM_TYPE getQuorumType() {
return QUORUM_TYPE.READ;
}
@Override
public String getName() {
return "record_read";
}
@Override
public boolean isIdempotent() {
return true;
}
}