com.amazonaws.services.kinesis.multilang.MultiLangRecordProcessorFactory.java Source code

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Here is the source code for com.amazonaws.services.kinesis.multilang.MultiLangRecordProcessorFactory.java

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/*
 * Copyright 2014 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Amazon Software License (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 * http://aws.amazon.com/asl/
 *
 * or in the "license" file accompanying this file. This file 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 com.amazonaws.services.kinesis.multilang;

import java.util.concurrent.ExecutorService;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.amazonaws.services.kinesis.clientlibrary.interfaces.IRecordProcessor;
import com.amazonaws.services.kinesis.clientlibrary.interfaces.IRecordProcessorFactory;
import com.fasterxml.jackson.databind.ObjectMapper;

/**
 * Creates {@link MultiLangRecordProcessor}'s.
 */
public class MultiLangRecordProcessorFactory implements IRecordProcessorFactory {

    private static final Log LOG = LogFactory.getLog(MultiLangRecordProcessorFactory.class);

    private static final String COMMAND_DELIMETER_REGEX = " +";

    private final String command;
    private final String[] commandArray;

    private final ObjectMapper objectMapper;

    private final ExecutorService executorService;

    /**
     * @param command The command that will do processing for this factory's record processors.
     * @param executorService An executor service to use while processing inputs and outputs of the child process.
     */
    public MultiLangRecordProcessorFactory(String command, ExecutorService executorService) {
        this(command, executorService, new ObjectMapper());
    }

    /**
     * @param command The command that will do processing for this factory's record processors.
     * @param executorService An executor service to use while processing inputs and outputs of the child process.
     * @param objectMapper An object mapper used to convert messages to json to be written to the child process
     */
    public MultiLangRecordProcessorFactory(String command, ExecutorService executorService,
            ObjectMapper objectMapper) {
        this.command = command;
        this.commandArray = command.split(COMMAND_DELIMETER_REGEX);
        this.executorService = executorService;
        this.objectMapper = objectMapper;
    }

    @Override
    public IRecordProcessor createProcessor() {
        LOG.debug(String.format("Creating new record processor for client executable: %s", command));
        /*
         * Giving ProcessBuilder the command as an array of Strings allows users to specify command line arguments.
         */
        return new MultiLangRecordProcessor(new ProcessBuilder(commandArray), executorService, this.objectMapper);
    }

    String[] getCommandArray() {
        return commandArray;
    }
}