/*
* 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.core.StreamsDatum;
import org.apache.streams.core.StreamsPersistWriter;
import org.apache.streams.jackson.StreamsJacksonMapper;
import org.apache.streams.riak.pojo.RiakConfiguration;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.commons.lang3.StringUtils;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.entity.StringEntity;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Objects;
/**
* RiakHttpPersistWriter writes documents to riak via http.
*/
public class RiakHttpPersistWriter implements StreamsPersistWriter {
private RiakConfiguration configuration;
private RiakHttpClient client;
private static final Logger LOGGER = LoggerFactory.getLogger(RiakHttpPersistWriter.class);
private static final ObjectMapper MAPPER = StreamsJacksonMapper.getInstance();
public RiakHttpPersistWriter(RiakConfiguration configuration) {
this.configuration = configuration;
}
@Override
public String getId() {
return "RiakHttpPersistWriter";
}
@Override
public void prepare(Object configurationObject) {
client = RiakHttpClient.getInstance(this.configuration);
}
@Override
public void cleanUp() {
client = null;
}
@Override
public void write(StreamsDatum entry) {
Objects.nonNull(client);
String id = null;
String document;
String bucket;
String bucketType;
String contentType;
String charset;
if( StringUtils.isNotBlank(entry.getId())) {
id = entry.getId();
}
if( entry.getDocument() instanceof String) {
document = (String)entry.getDocument();
} else {
try {
document = MAPPER.writeValueAsString(entry.getDocument());
} catch( Exception e ) {
LOGGER.warn("Exception", e);
return;
}
}
if( entry.getMetadata() != null
&& entry.getMetadata().containsKey("bucket")
&& entry.getMetadata().get("bucket") instanceof String
&& StringUtils.isNotBlank((String)entry.getMetadata().get("bucket") )) {
bucket = (String)entry.getMetadata().get("bucket");
} else {
bucket = configuration.getDefaultBucket();
}
if( entry.getMetadata() != null
&& entry.getMetadata().containsKey("bucketType")
&& entry.getMetadata().get("bucketType") instanceof String
&& StringUtils.isNotBlank((String)entry.getMetadata().get("bucketType") )) {
bucketType = (String)entry.getMetadata().get("bucketType");
} else {
bucketType = configuration.getDefaultBucketType();
}
if( entry.getMetadata() != null
&& entry.getMetadata().containsKey("charset")
&& entry.getMetadata().get("charset") instanceof String
&& StringUtils.isNotBlank((String)entry.getMetadata().get("charset") )) {
charset = (String)entry.getMetadata().get("charset");
} else {
charset = configuration.getDefaultCharset();
}
if( entry.getMetadata() != null
&& entry.getMetadata().containsKey("contentType")
&& entry.getMetadata().get("contentType") instanceof String
&& StringUtils.isNotBlank((String)entry.getMetadata().get("contentType") )) {
contentType = (String)entry.getMetadata().get("contentType");
} else {
contentType = configuration.getDefaultContentType();
}
URIBuilder uriBuilder = new URIBuilder(client.baseURI);
if( bucket != null && StringUtils.isNotBlank(bucket)) {
uriBuilder.setPath("/riak/"+bucket);
}
if( id != null && StringUtils.isNotBlank(id)) {
uriBuilder.setPath("/riak/"+bucket+"/"+id);
}
URI uri;
try {
uri = uriBuilder.build();
} catch (URISyntaxException e) {
LOGGER.warn("URISyntaxException", e);
return;
}
HttpPost post = new HttpPost();
post.setHeader("Content-Type", contentType + "; charset=" + charset);
post.setURI(uri);
HttpEntity entity;
try {
entity = new StringEntity(document);
post.setEntity(entity);
} catch (UnsupportedEncodingException e) {
LOGGER.warn("UnsupportedEncodingException", e);
return;
}
try {
HttpResponse response = client.client().execute(post);
} catch (IOException e) {
LOGGER.warn("IOException", e);
return;
}
}
}