/*******************************************************************************
* Copyright 2011 Netflix
*
* 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.netflix.astyanax.thrift;
import java.nio.ByteBuffer;
import org.apache.cassandra.thrift.Cassandra;
import com.netflix.astyanax.CassandraOperationTracer;
import com.netflix.astyanax.connectionpool.ConnectionContext;
import com.netflix.astyanax.connectionpool.Host;
import com.netflix.astyanax.connectionpool.Operation;
import com.netflix.astyanax.connectionpool.exceptions.ConnectionException;
public abstract class AbstractOperationImpl<R> implements Operation<Cassandra.Client, R> {
private final CassandraOperationTracer tracer;
private Host pinnedHost;
public AbstractOperationImpl(CassandraOperationTracer tracer, Host host) {
this.tracer = tracer;
this.pinnedHost = host;
}
public AbstractOperationImpl(CassandraOperationTracer tracer) {
this.tracer = tracer;
this.pinnedHost = null;
}
public void setPinnedHost(Host host) {
this.pinnedHost = host;
}
@Override
public ByteBuffer getRowKey() {
return null;
}
@Override
public String getKeyspace() {
return null;
}
@Override
public R execute(Cassandra.Client client, ConnectionContext state) throws ConnectionException {
try {
tracer.start();
R result = internalExecute(client, state);
tracer.success();
return result;
}
catch (Exception e) {
ConnectionException ce = ThriftConverter.ToConnectionPoolException(e);
tracer.failure(ce);
throw ce;
}
}
@Override
public Host getPinnedHost() {
return pinnedHost;
}
protected abstract R internalExecute(Cassandra.Client client, ConnectionContext state) throws Exception;
}