UploaderFactory.java

/**
 * 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
 * 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 org.apache.storm.s3.output;


import com.amazonaws.ClientConfiguration;
import com.amazonaws.Protocol;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.AWSCredentialsProvider;
import com.amazonaws.auth.DefaultAWSCredentialsProviderChain;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3Client;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Map;

public class UploaderFactory {

    private static final Logger LOG = LoggerFactory.getLogger(UploaderFactory.class);

    public static final String S3_PROTOCOL = "S3_PROTOCOL";
    public static final String S3_PROXY = "S3_PROXY";
    public static final String S3_PROXY_PORT = "S3_PROXY_PORT";
    public static final String S3_ENDPOINT = "S3_ENDPOINT";
    public static final String UPLOADER_CLASS = "UPLOADER_CLASS";


    public static Uploader buildUploader(Map conf) {
        Protocol protocol = Protocol.HTTPS;
        String proxy = null;
        int proxyPort = 0;
        if (conf.containsKey(S3_PROTOCOL)) {
            protocol = Protocol.valueOf((String) conf.get(S3_PROTOCOL));
        }
        if (conf.containsKey(S3_PROXY)) {
            proxy = (String) conf.get(S3_PROXY);
        }
        if (conf.containsKey(S3_PROXY_PORT)) {
            proxyPort = ((Long) conf.get(S3_PROXY_PORT)).intValue();
        }
        AWSCredentialsProvider provider = new DefaultAWSCredentialsProviderChain();
        AWSCredentials credentials = provider.getCredentials();
        ClientConfiguration config = new ClientConfiguration().withProtocol(protocol);
        if (proxy != null) {
            config.withProxyHost(proxy);
        }
        if (proxyPort != 0) {
            config.withProxyPort(proxyPort);
        }
        AmazonS3 client = new AmazonS3Client(credentials, config);
        if (conf.containsKey(S3_ENDPOINT)) {
            client.setEndpoint((String) conf.get(S3_ENDPOINT));
        }
        return getUploader(conf, client);
    }

    private static Uploader getUploader(Map stormConf, AmazonS3 client) {
        Uploader uploader = new PutRequestUploader(client);
        if (stormConf.containsKey(UPLOADER_CLASS)) {
            String className = (String) stormConf.get(UPLOADER_CLASS);
            try {
                Class clazz = Class.forName(className);
                uploader = (Uploader) clazz.getConstructor(AmazonS3.class).newInstance(client);
            } catch (Exception e) {
                LOG.error("Failed to construct serialization delegate, falling back to default", e);
            }
        }
        return uploader;
    }
}