/**
* 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
* <p/>
* http://www.apache.org/licenses/LICENSE-2.0
* <p/>
* 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 storm.trident.windowing;
import java.util.List;
import java.util.Map;
import org.apache.commons.lang.IllegalClassException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.collect.Lists;
import backtype.storm.topology.FailedException;
import storm.trident.operation.TridentCollector;
import storm.trident.operation.TridentOperationContext;
import storm.trident.state.StateUpdater;
import storm.trident.tuple.TridentTuple;
/**
* {@code StateUpdater<WindowState>} instance which removes successfully emitted triggers from store
*/
public class WindowsStateUpdater implements StateUpdater<WindowsState> {
private static final Logger LOG = LoggerFactory.getLogger(WindowsStateUpdater.class);
private final WindowsStoreFactory windowStoreFactory;
private WindowsStore windowsStore;
public WindowsStateUpdater(WindowsStoreFactory windowStoreFactory) {
this.windowStoreFactory = windowStoreFactory;
}
@Override
public void updateState(WindowsState state, List<TridentTuple> tuples, TridentCollector collector) {
Long currentTxId = state.getCurrentTxId();
LOG.debug("Removing triggers using WindowStateUpdater, txnId: [{}] ", currentTxId);
for (TridentTuple tuple : tuples) {
try {
Object fieldValue = tuple.getValueByField(WindowTridentProcessor.TRIGGER_FIELD_NAME);
if (!(fieldValue instanceof WindowTridentProcessor.TriggerInfo)) {
throw new IllegalClassException(WindowTridentProcessor.TriggerInfo.class, fieldValue.getClass());
}
WindowTridentProcessor.TriggerInfo triggerInfo = (WindowTridentProcessor.TriggerInfo) fieldValue;
String triggerCompletedKey = WindowTridentProcessor.getWindowTriggerInprocessIdPrefix(triggerInfo.windowTaskId) + currentTxId;
LOG.debug("Removing trigger key [{}] and trigger completed key [{}] from store: [{}]", triggerInfo, triggerCompletedKey, windowsStore);
windowsStore.removeAll(Lists.newArrayList(triggerInfo.generateTriggerKey(), triggerCompletedKey));
} catch (Exception ex) {
LOG.warn(ex.getMessage());
collector.reportError(ex);
throw new FailedException(ex);
}
}
}
@Override
public void prepare(Map conf, TridentOperationContext context) {
windowsStore = windowStoreFactory.create();
}
@Override
public void cleanup() {
windowsStore.shutdown();
}
}