/**
* 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.camel.component.gora;
import java.lang.reflect.InvocationTargetException;
import java.util.concurrent.ExecutorService;
import org.apache.camel.Consumer;
import org.apache.camel.Endpoint;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.component.gora.utils.GoraUtils;
import org.apache.camel.impl.ScheduledPollConsumer;
import org.apache.gora.persistency.Persistent;
import org.apache.gora.query.Query;
import org.apache.gora.query.Result;
import org.apache.gora.store.DataStore;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Implementation of Camel-Gora {@link Consumer}.
*
*/
public class GoraConsumer extends ScheduledPollConsumer {
/**
* logger
*/
private static final Logger LOG = LoggerFactory.getLogger(GoraConsumer.class);
/**
* GORA datastore
*/
private final DataStore<Object, Persistent> dataStore;
/**
* Camel-Gora endpoint configuration
*/
private final GoraConfiguration configuration;
/**
* Camel Gora Query
*/
private Query query;
/**
* executor service
*/
private ExecutorService executor;
/**
* Poll run
*/
private boolean firstRun;
/**
* Consumer Constructor
*
* @param endpoint Reference to the Camel-Gora endpoint
* @param processor Reference to Consumer Processor
* @param configuration Reference to Camel-Gora endpoint configuration
* @param dataStore Reference to the datastore
*/
public GoraConsumer(final Endpoint endpoint,
final Processor processor,
final GoraConfiguration configuration,
final DataStore<Object, Persistent> dataStore) throws ClassNotFoundException, NoSuchMethodException, InvocationTargetException, IllegalAccessException {
super(endpoint, processor);
this.configuration = configuration;
this.dataStore = dataStore;
this.query = GoraUtils.constractQueryFromConfiguration(this.dataStore, this.configuration);
}
/**
* {@inheritDoc}
*/
@Override
protected int poll() throws Exception {
final Exchange exchange = this.getEndpoint().createExchange();
// compute time (aprox) since last update
if (firstRun) {
this.query.setStartTime(System.currentTimeMillis());
} else {
this.query.setStartTime(System.currentTimeMillis() - getDelay());
}
//proceed with query
final Result result = query.execute();
LOG.trace("Processing exchange [{}]...", exchange);
try {
getProcessor().process(exchange);
} finally {
if (exchange.getException() != null) {
getExceptionHandler().handleException("Error processing exchange", exchange, exchange.getException());
}
}
return Long.valueOf(result.getOffset()).intValue();
}
}