/*
* 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.riak.binary;
import org.apache.streams.core.StreamsDatum;
import org.apache.streams.core.StreamsPersistReader;
import org.apache.streams.core.StreamsResultSet;
import org.apache.streams.riak.pojo.RiakConfiguration;
import com.basho.riak.client.api.commands.kv.FetchValue;
import com.basho.riak.client.api.commands.kv.ListKeys;
import com.basho.riak.client.api.commands.kv.MultiFetch;
import com.basho.riak.client.core.RiakFuture;
import com.basho.riak.client.core.query.Location;
import com.basho.riak.client.core.query.Namespace;
import com.google.common.collect.Queues;
import org.apache.commons.lang.NotImplementedException;
import org.joda.time.DateTime;
import java.math.BigInteger;
import java.util.Objects;
import java.util.Queue;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.LinkedBlockingQueue;
/**
* RiakBinaryPersistReader reads documents from riak via binary protocol.
*/
public class RiakBinaryPersistReader implements StreamsPersistReader {
private RiakConfiguration configuration;
public RiakBinaryClient client;
public RiakBinaryPersistReader(RiakConfiguration configuration) {
this.configuration = configuration;
}
@Override
public String getId() {
return "RiakBinaryPersistReader";
}
@Override
public void prepare(Object configurationObject) {
client = RiakBinaryClient.getInstance(this.configuration);
}
@Override
public void cleanUp() {
client = null;
}
@Override
public synchronized StreamsResultSet readAll() {
Queue<StreamsDatum> readAllQueue = constructQueue();
Namespace ns = new Namespace(configuration.getDefaultBucketType(), configuration.getDefaultBucket());
ListKeys lk = new ListKeys.Builder(ns).build();
ListKeys.Response listKeysResponse = null;
try {
listKeysResponse = client.client().execute(lk);
} catch (Exception e) {
e.printStackTrace();
return null;
}
MultiFetch multiFetch = new MultiFetch.Builder().addLocations(listKeysResponse).build();
MultiFetch.Response multiFetchResponse = null;
try {
multiFetchResponse = client.client().execute(multiFetch);
} catch (ExecutionException e) {
e.printStackTrace();
return null;
} catch (InterruptedException e) {
e.printStackTrace();
return null;
}
for (RiakFuture<FetchValue.Response, Location> f : multiFetchResponse) {
try {
FetchValue.Response response = f.get();
readAllQueue.add(new StreamsDatum(response.getValue(String.class), f.getQueryInfo().getKeyAsString()));
}
catch (ExecutionException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
return new StreamsResultSet(readAllQueue);
}
@Override
public void startStream() {
throw new NotImplementedException();
}
@Override
public StreamsResultSet readCurrent() {
throw new NotImplementedException();
}
@Override
public StreamsResultSet readNew(BigInteger sequence) {
throw new NotImplementedException();
}
@Override
public StreamsResultSet readRange(DateTime start, DateTime end) {
throw new NotImplementedException();
}
@Override
public boolean isRunning() {
return Objects.nonNull(client);
}
private Queue<StreamsDatum> constructQueue() {
return Queues.synchronizedQueue(new LinkedBlockingQueue<StreamsDatum>(10000));
}
}