/*
 * 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.servicemix.jbi.installation;

import java.io.*;

import javax.jbi.JBIException;
import javax.jbi.component.Bootstrap;
import javax.jbi.component.Component;
import javax.jbi.component.ComponentLifeCycle;
import javax.jbi.component.ServiceUnitManager;
import javax.jbi.management.LifeCycleMBean;
import javax.management.MBeanServerInvocationHandler;
import javax.management.ObjectName;

import org.apache.servicemix.jbi.util.FileUtil;
import org.easymock.MockControl;

public class HotDeployTest extends AbstractManagementTest {

    // Create mocks
    protected ExtMockControl bootstrapMock;

    protected Bootstrap bootstrap;

    protected ExtMockControl componentMock;

    protected Component component;

    protected ExtMockControl lifecycleMock;

    protected ComponentLifeCycle lifecycle;

    protected ExtMockControl managerMock;

    protected ServiceUnitManager manager;

    protected void setUp() throws Exception {
        super.setUp();
        // Create mocks
        bootstrapMock = ExtMockControl.createControl(Bootstrap.class);
        bootstrap = (Bootstrap) bootstrapMock.getMock();
        Bootstrap1.setDelegate(bootstrap);
        componentMock = ExtMockControl.createControl(Component.class);
        component = (Component) componentMock.getMock();
        Component1.setDelegate(component);
        lifecycleMock = ExtMockControl.createControl(ComponentLifeCycle.class);
        lifecycle = (ComponentLifeCycle) lifecycleMock.getMock();
        managerMock = ExtMockControl.createControl(ServiceUnitManager.class);
        manager = (ServiceUnitManager) managerMock.getMock();
    }

    protected void reset() {
        bootstrapMock.reset();
        componentMock.reset();
        lifecycleMock.reset();
        managerMock.reset();
    }

    protected void replay() {
        bootstrapMock.replay();
        componentMock.replay();
        lifecycleMock.replay();
        managerMock.replay();
    }

    protected void verify() {
        bootstrapMock.verify();
        componentMock.verify();
        lifecycleMock.verify();
        managerMock.verify();
    }

    protected void initContainer() {
        container.setCreateMBeanServer(true);
        container.setMonitorInstallationDirectory(true);
        container.setMonitorDeploymentDirectory(true);
        container.setMonitorInterval(1);
    }

    /**
     * Simulate a slow copy or a large file deployment by copying small chinks of the file at a time.
     * 
     * @param in
     * @param out
     * @throws IOException
     */
    private static void slowCopyInputStream(InputStream in, OutputStream out) throws IOException {
        byte[] buffer = new byte[1];
        int len = in.read(buffer);
        while (len >= 0) {
            try {
                Thread.sleep(10);
            } catch (InterruptedException e) {
                // Do nothing
            }
            out.write(buffer, 0, len);
            len = in.read(buffer);
        }
        in.close();
        out.close();
    }

    /**
     * Test a slow copy or similar type of file copy such as scp or ftp remote upload.
     * 
     * @throws Exception
     */

    public void testHotDeploySlowCopy() throws Exception {
        final Object lock = new Object();
        // configure mocks
        Bootstrap1.setDelegate(new BootstrapDelegate(bootstrap) {
            public void cleanUp() throws JBIException {
                super.cleanUp();
                synchronized (lock) {
                    lock.notify();
                }
            }
        });
        reset();
        bootstrap.init(null);
        bootstrapMock.setMatcher(MockControl.ALWAYS_MATCHER);
        bootstrap.getExtensionMBeanName();
        bootstrapMock.setReturnValue(null);
        bootstrap.onInstall();
        bootstrap.cleanUp();
        component.getLifeCycle();
        componentMock.setReturnValue(lifecycle);
        lifecycle.init(null);
        lifecycleMock.setMatcher(MockControl.ALWAYS_MATCHER);
        lifecycle.start();
        replay();
        // test component installation
        startContainer(true);
        String installJarUrl = createInstallerArchive("component1").getAbsolutePath();
        File hdInstaller = new File(container.getEnvironmentContext().getInstallationDir(), new File(installJarUrl).getName());

        synchronized (lock) {
            slowCopyInputStream(new FileInputStream(installJarUrl), new FileOutputStream(hdInstaller));
            lock.wait(5000);
        }
        Thread.sleep(50);

        ObjectName lifecycleName = container.getComponent("component1").getMBeanName();
        assertNotNull(lifecycleName);
        LifeCycleMBean lifecycleMBean = (LifeCycleMBean) MBeanServerInvocationHandler.newProxyInstance(container.getMBeanServer(),
                        lifecycleName, LifeCycleMBean.class, false);
        assertEquals(LifeCycleMBean.STARTED, lifecycleMBean.getCurrentState());
        // check mocks
        verify();

        // Clean shutdown
        reset();
        component.getLifeCycle();
        componentMock.setReturnValue(lifecycle);
        lifecycle.stop();
        lifecycle.shutDown();
        replay();
        shutdownContainer();
    }

    public void testHotDeployComponent() throws Exception {
        final Object lock = new Object();
        // configure mocks
        Bootstrap1.setDelegate(new BootstrapDelegate(bootstrap) {
            public void cleanUp() throws JBIException {
                super.cleanUp();
                synchronized (lock) {
                    lock.notify();
                }
            }
        });
        reset();
        bootstrap.init(null);
        bootstrapMock.setMatcher(MockControl.ALWAYS_MATCHER);
        bootstrap.getExtensionMBeanName();
        bootstrapMock.setReturnValue(null);
        bootstrap.onInstall();
        bootstrap.cleanUp();
        component.getLifeCycle();
        componentMock.setReturnValue(lifecycle);
        lifecycle.init(null);
        lifecycleMock.setMatcher(MockControl.ALWAYS_MATCHER);
        lifecycle.start();
        replay();
        // test component installation
        startContainer(true);
        String installJarUrl = createInstallerArchive("component1").getAbsolutePath();
        File hdInstaller = new File(container.getEnvironmentContext().getInstallationDir(), new File(installJarUrl).getName());
        synchronized (lock) {
            FileUtil.copyInputStream(new FileInputStream(installJarUrl), new FileOutputStream(hdInstaller));
            lock.wait(5000);
        }
        Thread.sleep(50);
        ObjectName lifecycleName = container.getComponent("component1").getMBeanName();
        assertNotNull(lifecycleName);
        LifeCycleMBean lifecycleMBean = (LifeCycleMBean) MBeanServerInvocationHandler.newProxyInstance(container.getMBeanServer(),
                        lifecycleName, LifeCycleMBean.class, false);
        assertEquals(LifeCycleMBean.STARTED, lifecycleMBean.getCurrentState());
        // check mocks
        verify();

        // Clean shutdown
        reset();
        component.getLifeCycle();
        componentMock.setReturnValue(lifecycle);
        lifecycle.stop();
        lifecycle.shutDown();
        replay();
        shutdownContainer();
    }

    public void testHotDeployUndeployComponent() throws Exception {
        final Object lock = new Object();
        // configure mocks
        Bootstrap1.setDelegate(new BootstrapDelegate(bootstrap) {
            public void cleanUp() throws JBIException {
                super.cleanUp();
                synchronized (lock) {
                    lock.notify();
                }
            }
        });
        reset();
        bootstrap.init(null);
        bootstrapMock.setMatcher(MockControl.ALWAYS_MATCHER);
        bootstrap.getExtensionMBeanName();
        bootstrapMock.setReturnValue(null);
        bootstrap.onInstall();
        bootstrap.cleanUp();
        component.getLifeCycle();
        componentMock.setReturnValue(lifecycle);
        lifecycle.init(null);
        lifecycleMock.setMatcher(MockControl.ALWAYS_MATCHER);
        lifecycle.start();
        replay();
        // test component installation
        startContainer(true);
        String installJarUrl = createInstallerArchive("component1").getAbsolutePath();
        File hdInstaller = new File(container.getEnvironmentContext().getInstallationDir(), new File(installJarUrl).getName());
        synchronized (lock) {
            FileUtil.copyInputStream(new FileInputStream(installJarUrl), new FileOutputStream(hdInstaller));
            lock.wait(5000);
        }
        Thread.sleep(50);
        ObjectName lifecycleName = container.getComponent("component1").getMBeanName();
        assertNotNull(lifecycleName);
        LifeCycleMBean lifecycleMBean = (LifeCycleMBean) MBeanServerInvocationHandler.newProxyInstance(container.getMBeanServer(),
                        lifecycleName, LifeCycleMBean.class, false);
        assertEquals(LifeCycleMBean.STARTED, lifecycleMBean.getCurrentState());
        // check mocks
        verify();

        // Configure mocks
        reset();
        bootstrap.onUninstall();
        bootstrap.cleanUp();
        lifecycle.stop();
        lifecycle.shutDown();
        // manager.shutDown("su");
        replay();
        // test component uninstallation
        synchronized (lock) {
            assertTrue(hdInstaller.delete());
            lock.wait(5000);
        }
        Thread.sleep(50);
        assertNull(container.getComponent("component1"));
        // check mocks
        verify();

        // Clean shutdown
        reset();
        replay();
        shutdownContainer();
    }

    public void testDeploySAThenComponent() throws Exception {
        final Object lock = new Object();
        // configure mocks
        Bootstrap1.setDelegate(new BootstrapDelegate(bootstrap) {
            public void cleanUp() throws JBIException {
                super.cleanUp();
                synchronized (lock) {
                    lock.notify();
                }
            }
        });
        reset();
        bootstrap.init(null);
        bootstrapMock.setMatcher(MockControl.ALWAYS_MATCHER);
        bootstrap.getExtensionMBeanName();
        bootstrapMock.setReturnValue(null);
        bootstrap.onInstall();
        bootstrap.cleanUp();
        component.getLifeCycle();
        componentMock.setReturnValue(lifecycle);
        lifecycle.init(null);
        lifecycleMock.setMatcher(MockControl.ALWAYS_MATCHER);
        lifecycle.start();
        component.getServiceUnitManager();
        componentMock.setReturnValue(manager, MockControl.ONE_OR_MORE);
        manager.deploy(null, null);
        managerMock.setMatcher(MockControl.ALWAYS_MATCHER);
        managerMock.setReturnValue(null);
        manager.init(null, null);
        managerMock.setMatcher(MockControl.ALWAYS_MATCHER);
        manager.start("su");
        replay();
        // test component installation
        startContainer(true);
        File saJarUrl = createServiceAssemblyArchive("sa", "su", "component1");
        File hdSa = new File(container.getEnvironmentContext().getDeploymentDir(), saJarUrl.getName());
        FileUtil.copyInputStream(new FileInputStream(saJarUrl), new FileOutputStream(hdSa));
        Thread.sleep(2000);

        String installJarUrl = createInstallerArchive("component1").getAbsolutePath();
        File hdInstaller = new File(container.getEnvironmentContext().getInstallationDir(), new File(installJarUrl).getName());
        synchronized (lock) {
            FileUtil.copyInputStream(new FileInputStream(installJarUrl), new FileOutputStream(hdInstaller));
            lock.wait(5000);
        }
        Thread.sleep(2000);
        ObjectName lifecycleName = container.getComponent("component1").getMBeanName();
        assertNotNull(lifecycleName);
        LifeCycleMBean lifecycleMBean = (LifeCycleMBean) MBeanServerInvocationHandler.newProxyInstance(container.getMBeanServer(),
                        lifecycleName, LifeCycleMBean.class, false);
        assertEquals(LifeCycleMBean.STARTED, lifecycleMBean.getCurrentState());
        // check mocks
        verify();

        // Clean shutdown
        reset();
        component.getLifeCycle();
        componentMock.setReturnValue(lifecycle);
        component.getServiceUnitManager();
        componentMock.setReturnValue(manager, MockControl.ONE_OR_MORE);
        lifecycle.stop();
        manager.shutDown("su");
        lifecycle.shutDown();
        replay();
        shutdownContainer();
    }
}
