/*
* 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.http;
import org.apache.streams.riak.pojo.RiakConfiguration;
import org.apache.http.client.HttpClient;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.net.URI;
import java.util.Map;
import java.util.Objects;
import java.util.concurrent.ConcurrentHashMap;
/**
* RiakHttpClient maintains shared connections to riak via http.
*/
public class RiakHttpClient {
private static final Logger LOGGER = LoggerFactory
.getLogger(RiakHttpClient.class);
public RiakConfiguration config;
protected CloseableHttpClient client;
protected URI baseURI;
private RiakHttpClient(RiakConfiguration config) {
this.config = config;
try {
this.start();
} catch (Exception e) {
e.printStackTrace();
this.client = null;
}
}
private static Map<RiakConfiguration, RiakHttpClient> INSTANCE_MAP = new ConcurrentHashMap<>();
public static RiakHttpClient getInstance(RiakConfiguration riakConfiguration) {
if ( INSTANCE_MAP != null
&& INSTANCE_MAP.size() > 0
&& INSTANCE_MAP.containsKey(riakConfiguration)) {
return INSTANCE_MAP.get(riakConfiguration);
} else {
RiakHttpClient instance = new RiakHttpClient(riakConfiguration);
if( instance != null && instance.client != null ) {
INSTANCE_MAP.put(riakConfiguration, instance);
return instance;
} else {
return null;
}
}
}
public void start() throws Exception {
Objects.nonNull(config);
assert(config.getScheme().startsWith("http"));
URIBuilder uriBuilder = new URIBuilder();
uriBuilder.setScheme(config.getScheme());
uriBuilder.setHost(config.getHosts().get(0));
uriBuilder.setPort(config.getPort().intValue());
baseURI = uriBuilder.build();
client = HttpClients.createDefault();
}
public void stop() {
try {
client.close();
} catch( Exception e) {
LOGGER.error( "Exception", e );
} finally {
client = null;
}
}
public RiakConfiguration config() {
return config;
}
public HttpClient client() {
return client;
}
}