/*
* Copyright 2011 Google Inc. All Rights Reserved.
*
* 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.google.walkaround.wave.server.googleimport;
import com.google.appengine.api.datastore.Entity;
import com.google.appengine.api.datastore.Key;
import com.google.appengine.tools.mapreduce.AppEngineMapper;
import com.google.inject.Inject;
import com.google.walkaround.util.server.RetryHelper;
import com.google.walkaround.util.server.RetryHelper.PermanentFailure;
import com.google.walkaround.util.server.RetryHelper.RetryableFailure;
import com.google.walkaround.wave.server.GuiceSetup;
import org.apache.hadoop.io.NullWritable;
import java.io.IOException;
import java.util.logging.Logger;
/**
* Mapreduce mapper that schedules new a task queue task for every pending
* import task.
*
* @author ohler@google.com (Christian Ohler)
*/
public class RetryTasksMapper extends AppEngineMapper<Key, Entity, NullWritable, NullWritable> {
@SuppressWarnings("unused")
private static final Logger log = Logger.getLogger(RetryTasksMapper.class.getName());
private static class Handler {
@Inject PerUserTable perUserTable;
void process(Context context, final Entity entity) throws PermanentFailure {
new RetryHelper().run(new RetryHelper.VoidBody() {
@Override public void run() throws PermanentFailure, RetryableFailure {
perUserTable.rescheduleExistingTask(perUserTable.parseTaskEntity(entity));
}
});
}
}
@Override
public void map(Key key, Entity entity, Context context) throws IOException {
context.getCounter(getClass().getSimpleName(), "entities-seen").increment(1);
log.info("Re-indexing " + key);
try {
GuiceSetup.getInjectorForTaskQueueTask().getInstance(Handler.class).process(context, entity);
} catch (PermanentFailure e) {
throw new IOException("PermanentFailure re-indexing key " + key, e);
}
context.getCounter(getClass().getSimpleName(), "entities-processed").increment(1);
}
}