/*
* 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
*
* 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.streams.gmail.provider;
import org.apache.streams.config.ComponentConfigurator;
import org.apache.streams.config.StreamsConfigurator;
import org.apache.streams.core.DatumStatusCounter;
import org.apache.streams.core.StreamsDatum;
import org.apache.streams.core.StreamsProvider;
import org.apache.streams.core.StreamsResultSet;
import org.apache.streams.gmail.GMailConfiguration;
import com.googlecode.gmail4j.GmailClient;
import com.googlecode.gmail4j.GmailConnection;
import com.googlecode.gmail4j.http.HttpGmailConnection;
import com.googlecode.gmail4j.javamail.ImapGmailClient;
import com.googlecode.gmail4j.javamail.ImapGmailConnection;
import com.googlecode.gmail4j.rss.RssGmailClient;
import org.joda.time.DateTime;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.Serializable;
import java.math.BigInteger;
import java.util.Objects;
import java.util.Queue;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
/**
* GMailProvider collects messages from GMail.
*/
public class GMailProvider implements StreamsProvider, Serializable {
public final static String STREAMS_ID = "GMailProvider";
private final static Logger LOGGER = LoggerFactory.getLogger(GMailProvider.class);
protected BlockingQueue inQueue = new LinkedBlockingQueue<>(10000);
protected volatile Queue<StreamsDatum> providerQueue = new ConcurrentLinkedQueue<>();
protected Future task;
protected GmailClient rssClient;
protected ImapGmailClient imapClient;
protected DatumStatusCounter countersTotal = new DatumStatusCounter();
protected DatumStatusCounter countersCurrent = new DatumStatusCounter();
private GMailConfiguration config;
private Class klass;
private ExecutorService executor;
public GMailProvider() {
this.config = new ComponentConfigurator<>(GMailConfiguration.class)
.detectConfiguration(StreamsConfigurator.getConfig().getConfig("gmail"));
}
public GMailProvider(GMailConfiguration config) {
this.config = config;
}
public GMailProvider(Class klass) {
this.config = new ComponentConfigurator<>(GMailConfiguration.class)
.detectConfiguration(StreamsConfigurator.getConfig().getConfig("gmail"));
this.klass = klass;
}
public GMailProvider(GMailConfiguration config, Class klass) {
this.config = config;
this.klass = klass;
}
private static ExecutorService newFixedThreadPoolWithQueueSize(int nThreads, int queueSize) {
return new ThreadPoolExecutor(nThreads, nThreads,
5000L, TimeUnit.MILLISECONDS,
new ArrayBlockingQueue<>(queueSize, true), new ThreadPoolExecutor.CallerRunsPolicy());
}
public GMailConfiguration getConfig() {
return config;
}
public void setConfig(GMailConfiguration config) {
this.config = config;
}
public BlockingQueue<Object> getInQueue() {
return inQueue;
}
@Override
public String getId() {
return "GMailProvider";
}
@Override
public void startStream() {
task = executor.submit(new GMailImapProviderTask(this));
}
@Override
public StreamsResultSet readCurrent() {
StreamsResultSet current;
synchronized ( GMailProvider.class ) {
current = new StreamsResultSet(new ConcurrentLinkedQueue<>(providerQueue));
current.setCounter(new DatumStatusCounter());
current.getCounter().add(countersCurrent);
countersTotal.add(countersCurrent);
countersCurrent = new DatumStatusCounter();
providerQueue.clear();
}
return current;
}
@Override
public StreamsResultSet readNew(BigInteger sequence) {
return null;
}
@Override
public StreamsResultSet readRange(DateTime start, DateTime end) {
return null;
}
@Override
public boolean isRunning() {
return !task.isDone() && !task.isCancelled();
}
@Override
public void prepare(Object configurationObject) {
Objects.requireNonNull(this.klass);
Objects.requireNonNull(config.getUserName());
Objects.requireNonNull(config.getPassword());
rssClient = new RssGmailClient();
GmailConnection rssConnection = new HttpGmailConnection(config.getUserName(), config.getPassword().toCharArray());
rssClient.setConnection(rssConnection);
imapClient = new ImapGmailClient();
GmailConnection imapConnection = new ImapGmailConnection();
imapConnection.setLoginCredentials(config.getUserName(), config.getPassword().toCharArray());
imapClient.setConnection(imapConnection);
executor = Executors.newSingleThreadExecutor();
startStream();
}
@Override
public void cleanUp() {
try {
executor.awaitTermination(5, TimeUnit.SECONDS);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}