demos/workpool-distributed/src/main/java/node/WorkpoolNode.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 node;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.List;

import javax.xml.namespace.QName;

import org.apache.tuscany.sca.assembly.Composite;
import org.apache.tuscany.sca.assembly.Service;
import org.apache.tuscany.sca.contribution.Contribution;
import org.apache.tuscany.sca.contribution.DeployedArtifact;
import org.apache.tuscany.sca.contribution.service.impl.ContributionServiceImpl;
import org.apache.tuscany.sca.domain.SCADomain;
import org.apache.tuscany.sca.node.NodeManagerInitService;
import org.apache.tuscany.sca.node.SCANode;
import org.apache.tuscany.sca.node.SCANodeFactory;
import org.apache.tuscany.sca.node.impl.SCANodeImpl;
import java.net.URI;

import workpool.WorkerManager;
import workpool.WorkerManagerImpl;
import workpool.WorkpoolManager;
import workpool.WorkpoolService;
import workpool.WorkpoolServiceImpl;

/**
 * This client program shows how to run a distributed SCA node. In this case a
 * calculator node has been constructed specifically for running the calculator
 * composite. Internally it creates a representation of a node and associates a
 * distributed domain with the node. This separation is made different
 * implementations of the distributed domain can be provided.
 */
public class WorkpoolNode {

    public static void main(String[] args) throws Exception {

        // Check that the correct arguments have been provided
        if (null == args || args.length < 4) {
            System.err
                    .println("Useage: java WorkpoolNode domainname nodename iterTest workerNo");
            System.exit(1);
        }
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        String domainName = args[0];
        String nodeName = args[1];
        long iterations = Long.parseLong(args[2]);
        long jobsNo = Long.parseLong(args[3]);
        long workerNo = Long.parseLong(args[4]);
        ClassLoader cl = WorkpoolNode.class.getClassLoader();

        SCANodeFactory nodeFactory = SCANodeFactory.newInstance();
        SCANode node = nodeFactory.createSCANode(null, domainName);
        node.addContribution(nodeName, cl.getResource(nodeName + "/"));
        node.addToDomainLevelComposite(new QName("http://sample", "Workpool"));
        node.start();
        // nodeA is the head node and runs some tests while all other nodes
        // simply listen for incoming messages

        FileReader rules = new FileReader("workerRules.drl");
        StringBuffer buffer = new StringBuffer();

        BufferedReader br = new BufferedReader(rules);
        String ruleString;
        do {
            ruleString = br.readLine();
            if (ruleString != null) {
                buffer.append(ruleString + "\n");
            }
        } while (ruleString != null);

        if (nodeName.equals("nodeA")) {
            // do some application stuff
            WorkpoolService workpoolService = node.getDomain().getService(
                    WorkpoolService.class, "WorkpoolServiceComponent");
            workpoolService.start();
            NodeManagerInitService nodeInit = node.getDomain().getService(
                    NodeManagerInitService.class,
                    "WorkpoolManagerComponent/NodeManagerInitService");
            nodeInit.setNode(node);
            WorkpoolManager workpoolManager = node.getDomain().getService(
                    WorkpoolManager.class,
                    "WorkpoolManagerComponent/WorkpoolManager");
            workpoolManager.setWorkpoolReference(node.getDomain()
                    .getServiceReference(WorkpoolService.class,
                            "WorkpoolServiceComponent"));
            workpoolManager.setCycleTime(8000);
            workpoolManager.acceptRules(buffer.toString());
            workpoolManager.start();
            int items[] = { 3, 4, 5, 6, 3, 6, 3, 5, 9, 5, 6 };

            double x = 398349;

            for (int i = 0; i < jobsNo; ++i)
                workpoolService.submit(new TestJob(x, iterations, items));

            TestJob j = new TestJob(-1.0, true);
            for (int i = 0; i < workerNo + 1; ++i) {
                j.setEOS();
                workpoolService.submit(j);
            }

        }
        try {
            if (nodeName.equals("nodeB")) {
                NodeManagerInitService serviceNodeB = node
                        .getDomain()
                        .getService(NodeManagerInitService.class,
                                "WorkerManagerNodeBComponent/NodeManagerInitService");
                serviceNodeB.setNode(node);
            }
            if (nodeName.equals("nodeC")) {
                NodeManagerInitService workerManagerC = node
                        .getDomain()
                        .getService(NodeManagerInitService.class,
                                "WorkerManagerNodeCComponent/NodeManagerInitService");
                workerManagerC.setNode(node);
            }
            if (nodeName.equals("nodeD")) {
                NodeManagerInitService workerManagerD = node
                        .getDomain()
                        .getService(NodeManagerInitService.class,
                                "WorkerManagerNodeDComponent/NodeManagerInitService");
                workerManagerD.setNode(node);
            }
            if (nodeName.equals("nodeE")) {
                NodeManagerInitService workerManagerE = node
                        .getDomain()
                        .getService(NodeManagerInitService.class,
                                "WorkerManagerNodeEComponent/NodeManagerInitService");
                workerManagerE.setNode(node);
            }

            System.out.println("Node started (press enter to shutdown)");
            String buff;
            for (;;) {
                try {
                    buff = in.readLine();
                    if (buff == null)
                        break;
                    System.out.print(in.readLine());
                } catch (IOException ex) {
                    break; // Exit thread.
                }
            }
            // stop the node and all the domains in it
            node.stop();
            node.destroy();
            System.exit(0);
        } catch (Exception ex) {
            System.err.println("Exception in node - " + ex.getMessage());
            ex.printStackTrace(System.err);
        }
    }
}