NodeConcurrencyFilterTest.java

/*
 * SymmetricDS is an open source database synchronization solution.
 *   
 * Copyright (C) Chris Henson <chenson42@users.sourceforge.net>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see
 * <http://www.gnu.org/licenses/>.
 */
package org.jumpmind.symmetric.web;

import java.io.IOException;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletResponse;

import org.jumpmind.symmetric.common.Constants;
import org.jumpmind.symmetric.common.ParameterConstants;
import org.jumpmind.symmetric.service.IParameterService;
import org.jumpmind.symmetric.test.AbstractDatabaseTest;
import org.jumpmind.symmetric.transport.IConcurrentConnectionManager;
import org.junit.Assert;
import org.junit.Test;
import org.springframework.mock.web.MockHttpServletRequest;
import org.springframework.mock.web.MockHttpServletResponse;

public class NodeConcurrencyFilterTest extends AbstractDatabaseTest {

    public NodeConcurrencyFilterTest() throws Exception {
        super();
    }

    public NodeConcurrencyFilterTest(String dbName) {
        super(dbName);
    }

    @Test(timeout = 60000)
    public void testPullConcurrency() throws Exception {
        IParameterService parameterService = getParameterService();
        parameterService.saveParameter(ParameterConstants.CONCURRENT_WORKERS, 3);

        NodeConcurrencyFilter filter = (NodeConcurrencyFilter) find(Constants.NODE_CONCURRENCY_FILTER);

        MockWorker one = new MockWorker("00001", filter, "pull", "GET");
        MockWorker two = new MockWorker("00002", filter, "pull", "GET");
        MockWorker three = new MockWorker("00003", filter, "pull", "GET");
        MockWorker four = new MockWorker("00004", filter, "pull", "GET");

        one.start();
        Thread.sleep(500);

        two.start();
        Thread.sleep(500);

        three.start();
        Thread.sleep(500);

        four.start();
        Thread.sleep(500);

        Assert.assertEquals(one.reached, true);
        Assert.assertEquals(two.reached, true);
        Assert.assertEquals(three.reached, true);
        Assert.assertEquals(four.reached, false);

        one.hold = false;
        two.hold = false;
        three.hold = false;
        four.hold = false;

        Thread.sleep(500);

        Assert.assertEquals(one.success, true);
        Assert.assertEquals(two.success, true);
        Assert.assertEquals(three.success, true);
        Assert.assertEquals(four.success, false);

        MockWorker five = new MockWorker("00005", filter, "pull", "GET");
        five.hold = false;
        five.start();
        Thread.sleep(500);

        Assert.assertEquals(five.success, true);

    }

    @Test(timeout = 60000)
    public void testPushConcurrency() throws Exception {
        IParameterService parameterService = getParameterService();
        parameterService.saveParameter(ParameterConstants.CONCURRENT_WORKERS, 2);

        NodeConcurrencyFilter filter = (NodeConcurrencyFilter) find(Constants.NODE_CONCURRENCY_FILTER);

        IConcurrentConnectionManager manager = (IConcurrentConnectionManager) find(Constants.CONCURRENT_CONNECTION_MANGER);

        MockWorker one = new MockWorker("00001", filter, "push", "HEAD");
        MockWorker two = new MockWorker("00002", filter, "push", "HEAD");

        one.start();
        two.start();
        Thread.sleep(500);

        Assert.assertEquals(manager.getReservationCount("/sync/push"), 2);

        one = new MockWorker("00001", filter, "push", "PUT");
        two = new MockWorker("00002", filter, "push", "PUT");

        one.start();
        two.start();
        Thread.sleep(500);

        Assert.assertEquals(one.reached, true);
        Assert.assertEquals(two.reached, true);

        Assert.assertEquals(manager.getReservationCount("/sync/push"), 2);

        MockWorker five = new MockWorker("00005", filter, "push", "PUT");
        five.hold = false;
        five.start();
        Thread.sleep(500);

        Assert.assertEquals(five.reached, false);
        Assert.assertEquals(manager.getReservationCount("/sync/push"), 2);

        one.hold = false;
        two.hold = false;
        Thread.sleep(500);

        Assert.assertEquals(manager.getReservationCount("/sync/push"), 0);

    }

    class MockWorker extends Thread {

        private String servletPath;
        private String httpMethod;
        Exception inError;
        NodeConcurrencyFilter filter;
        String nodeId;
        boolean success = false;
        boolean hold = true;
        boolean reached = false;

        MockWorker(String nodeId, NodeConcurrencyFilter filter, String path, String httpMethod) {
            this.setDaemon(true);
            this.nodeId = nodeId;
            this.filter = filter;
            this.httpMethod = httpMethod;
            this.servletPath = path;
        }

        public void run() {

            MockHttpServletRequest req = new MockHttpServletRequest(httpMethod, "/sync/" + servletPath);
            req.addParameter(WebConstants.NODE_ID, nodeId);
            req.setServletPath(servletPath);

            HttpServletResponse resp = new MockHttpServletResponse();
            try {
                filter.doFilter(req, resp, new FilterChain() {
                    public void doFilter(ServletRequest request, ServletResponse response) throws IOException,
                            ServletException {
                        reached = true;

                        while (hold) {
                            try {
                                Thread.sleep(50);
                            } catch (InterruptedException e) {
                            }
                        }

                        success = true;
                    }
                });
            } catch (Exception e) {
                this.inError = e;
            }

        }

    }
}