/**
* 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 org.apache.flume.sink;
import java.util.List;
import java.util.Map;
import org.apache.flume.Context;
import org.apache.flume.FlumeException;
import org.apache.flume.Sink;
import org.apache.flume.SinkProcessor;
import org.apache.flume.conf.ComponentConfiguration;
import org.apache.flume.conf.Configurables;
import org.apache.flume.conf.sink.SinkProcessorType;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.base.Preconditions;
public class SinkProcessorFactory {
private static final Logger logger = LoggerFactory
.getLogger(SinkProcessorFactory.class);
private static final String TYPE = "type";
/**
* <p>
* Creates a sink processor and configures it using the provided context
* </p>
*
* @param context Context limited to that of the processor. Should include type
* and any settings relevant to that processor type. Referer to javadoc for
* specific sink
* @param sinks A non-null, non-empty list of sinks to be assigned to the
* processor
* @return A configured SinkProcessor
* @see org.apache.flume.SinkProcessorType
* @throws FlumeException Runtime exception thrown in the case of an invalid
* processor configuration
*/
@SuppressWarnings("unchecked")
public static SinkProcessor getProcessor(Context context,
List<Sink> sinks) {
Preconditions.checkNotNull(context);
Preconditions.checkNotNull(sinks);
Preconditions.checkArgument(!sinks.isEmpty());
Map<String, String> params = context.getParameters();
SinkProcessor processor;
String typeStr = params.get(TYPE);
SinkProcessorType type = SinkProcessorType.OTHER;
String processorClassName = typeStr;
try {
type = SinkProcessorType.valueOf(typeStr.toUpperCase());
} catch (Exception ex) {
logger.warn("Sink Processor type {} is a custom type", typeStr);
}
if(!type.equals(SinkProcessorType.OTHER)) {
processorClassName = type.getSinkProcessorClassName();
}
logger.debug("Creating instance of sink processor type {}, class {}",
typeStr, processorClassName);
Class<? extends SinkProcessor> processorClass = null;
try {
processorClass = (Class<? extends SinkProcessor>) Class.forName(
processorClassName);
} catch (Exception ex) {
throw new FlumeException("Unable to load sink processor type: " + typeStr
+ ", class: " + type.getSinkProcessorClassName(), ex);
}
try {
processor = processorClass.newInstance();
} catch (Exception e) {
throw new FlumeException("Unable to create sink processor, type: " + typeStr
+ ", class: " + processorClassName, e);
}
processor.setSinks(sinks);
Configurables.configure(processor, context);
return processor;
}
@SuppressWarnings("unchecked")
public static SinkProcessor getProcessor(ComponentConfiguration conf,
List<Sink> sinks) {
String typeStr = conf.getType();
SinkProcessor processor;
SinkProcessorType type = SinkProcessorType.DEFAULT;
try {
type = SinkProcessorType.valueOf(typeStr.toUpperCase());
} catch (Exception ex) {
logger.warn("Sink type {} does not exist, using default", typeStr);
}
Class<? extends SinkProcessor> processorClass = null;
try {
processorClass =
(Class<? extends SinkProcessor>) Class.forName(type
.getSinkProcessorClassName());
} catch (Exception ex) {
throw new FlumeException("Unable to load sink processor type: " + typeStr
+ ", class: " + type.getSinkProcessorClassName(), ex);
}
try {
processor = processorClass.newInstance();
} catch (Exception e) {
throw new FlumeException("Unable to create processor, type: " + typeStr
+ ", class: " + type.getSinkProcessorClassName(), e);
}
processor.setSinks(sinks);
Configurables.configure(processor, conf);
return processor;
}
}