/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 gobblin.writer.objectstore;
import java.io.IOException;
import lombok.Getter;
import com.codahale.metrics.Counter;
import gobblin.annotation.Alpha;
import gobblin.configuration.State;
import gobblin.instrumented.writer.InstrumentedDataWriter;
/**
* A writer to execute operations on a object in any object store. The record type of this writer is an {@link ObjectStoreOperation}.
* The {@link ObjectStoreOperation} encapsulates operation specific metadata and actions.
*/
@Alpha
@SuppressWarnings("rawtypes")
public class ObjectStoreWriter extends InstrumentedDataWriter<ObjectStoreOperation> {
private static final String OPERATIONS_EXECUTED_COUNTER = "gobblin.objectStoreWriter.operationsExecuted";
private final Counter operationsExecuted;
@Getter
private final ObjectStoreClient objectStoreClient;
public ObjectStoreWriter(ObjectStoreClient client, State state) {
super(state);
this.objectStoreClient = client;
this.operationsExecuted = this.getMetricContext().counter(OPERATIONS_EXECUTED_COUNTER);
}
@Override
public void close() throws IOException {
this.objectStoreClient.close();
}
/**
* Calls {@link ObjectStoreOperation#execute(ObjectStoreClient)} on the <code>operation</code> passed
*
* {@inheritDoc}
* @see gobblin.writer.DataWriter#write(java.lang.Object)
*/
@Override
public void writeImpl(ObjectStoreOperation operation) throws IOException {
operation.execute(this.getObjectStoreClient());
this.operationsExecuted.inc();
}
@Override
public void commit() throws IOException {
}
@Override
public void cleanup() throws IOException {
this.getObjectStoreClient().close();
}
@Override
public long recordsWritten() {
return this.operationsExecuted.getCount();
}
@Override
public long bytesWritten() throws IOException {
// TODO Will be added when ObjectStorePutOperation is implemented. Currently we only support ObjectStoreDeleteOperation
return 0;
}
}