1 files changed, 191 insertions, 0 deletions
diff --git a/bundles/org.eclipse.equinox.p2.installer/src/org/eclipse/equinox/internal/p2/installer/InstallApplication.java b/bundles/org.eclipse.equinox.p2.installer/src/org/eclipse/equinox/internal/p2/installer/InstallApplication.java
new file mode 100644
index 000000000..270d615eb
--- /dev/null
+++ b/bundles/org.eclipse.equinox.p2.installer/src/org/eclipse/equinox/internal/p2/installer/InstallApplication.java
@@ -0,0 +1,191 @@
+/*******************************************************************************
+ * Copyright (c) 2007 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.equinox.internal.p2.installer;
+
+import java.io.IOException;
+import java.lang.reflect.InvocationTargetException;
+import java.net.MalformedURLException;
+import java.net.URL;
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IPath;
+import org.eclipse.core.runtime.IStatus;
+import org.eclipse.core.runtime.Path;
+import org.eclipse.core.runtime.Status;
+import org.eclipse.core.runtime.SubMonitor;
+import org.eclipse.equinox.app.IApplication;
+import org.eclipse.equinox.app.IApplicationContext;
+import org.eclipse.equinox.p2.core.helpers.LogHelper;
+import org.eclipse.equinox.p2.installer.IInstallDescription;
+import org.eclipse.equinox.p2.installer.InstallAdvisor;
+
+/**
+ * This is a simple installer application built using P2.  The application must be given
+ * an "install description" as a command line argument or system property 
+ * ({@link #SYS_PROP_INSTALL_DESCRIPTION}).  The application reads this
+ * install description, and looks for an existing profile in the local install registry that
+ * matches it.  If no profile is found, it creates a new profile, and installs the root
+ * IU in the install description into the profile. It may then launch the installed application,
+ * depending on the specification in the install description.  If an existing profile is found,
+ * the application instead performs an update on the existing profile with the new root
+ * IU in the install description. Thus, an installed application can be updated by dropping
+ * in a new install description file, and re-running this installer application.
+ */
+public class InstallApplication implements IApplication {
+	/**
+	 * A property whose value is the URL of an install description. An install description is a file
+	 * that contains all the information required to complete the install.
+	 */
+	private static final String SYS_PROP_INSTALL_DESCRIPTION = "org.eclipse.equinox.p2.installDescription"; //$NON-NLS-1$
+
+	/**
+	 * The install advisor. This field is non null while the install application is running.
+	 */
+	private InstallAdvisor advisor;
+
+	/**
+	 * Throws an exception of severity error with the given error message.
+	 */
+	private static CoreException fail(String message) {
+		return fail(message, null);
+	}
+
+	/**
+	 * Throws an exception of severity error with the given error message.
+	 */
+	private static CoreException fail(String message, Throwable throwable) {
+		return new CoreException(new Status(IStatus.ERROR, InstallerActivator.PI_INSTALLER, message, throwable));
+	}
+
+	/**
+	 * Loads the install description, filling in any missing data if needed.
+	 */
+	private IInstallDescription computeInstallDescription() throws CoreException {
+		InstallDescription description = fetchInstallDescription(SubMonitor.convert(null));
+		//prompt user for install location if the description did not provide one
+		if (description.getInstallLocation() == null) {
+			String location = advisor.getInstallLocation(description);
+			if (location == null)
+				return null;
+			description.setInstallLocation(new Path(location));
+		}
+		return description;
+	}
+
+	private InstallAdvisor createInstallContext() {
+		//TODO create an appropriate advisor depending on whether headless or GUI install is desired.
+		InstallAdvisor result = new GraphicalInstallAdvisor();
+		result.start();
+		return result;
+	}
+
+	/**
+	 * Fetch and return the install description to be installed.
+	 */
+	private InstallDescription fetchInstallDescription(SubMonitor monitor) throws CoreException {
+		String site = System.getProperty(SYS_PROP_INSTALL_DESCRIPTION);
+		if (site == null)
+			throw fail("No install site provided");
+		try {
+			URL siteURL = new URL(site);
+			return (InstallDescription) InstallDescriptionParser.loadFromProperties(siteURL.openStream(), monitor);
+		} catch (MalformedURLException e) {
+			throw fail("Invalid install site: " + site, e);
+		} catch (IOException e) {
+			throw fail("Invalid install site: " + site, e);
+		}
+	}
+
+	private IStatus getStatus(final Exception failure) {
+		Throwable cause = failure;
+		//unwrap target exception if applicable
+		if (failure instanceof InvocationTargetException) {
+			cause = ((InvocationTargetException) failure).getTargetException();
+			if (cause == null)
+				cause = failure;
+		}
+		if (cause instanceof CoreException)
+			return ((CoreException) cause).getStatus();
+		return new Status(IStatus.ERROR, InstallerActivator.PI_INSTALLER, "An error occurred during installation", cause);
+	}
+
+	/**
+	 * Sends an informational message to the install context.
+	 */
+	private void info(String message) {
+		advisor.reportStatus(new Status(IStatus.INFO, InstallerActivator.PI_INSTALLER, message));
+	}
+
+	private void launchProduct(IInstallDescription description) throws CoreException {
+		IPath toRun = description.getInstallLocation().append(description.getLauncherName());
+		try {
+			Runtime.getRuntime().exec(toRun.toString());
+		} catch (IOException e) {
+			throw fail("Failed to launch the product: " + toRun, e);
+		}
+	}
+
+	/* (non-Javadoc)
+	 * @see org.eclipse.equinox.app.IApplication#start(org.eclipse.equinox.app.IApplicationContext)
+	 */
+	public Object start(IApplicationContext appContext) {
+		try {
+			advisor = createInstallContext();
+			//fetch description of what to install
+			IInstallDescription description = null;
+			try {
+				description = computeInstallDescription();
+				if (description == null) {
+					info("Install aborted");
+					return IApplication.EXIT_OK;
+				}
+				//perform long running install operation
+				InstallUpdateProductOperation operation = new InstallUpdateProductOperation(InstallerActivator.getDefault().getContext(), description);
+				advisor.getRunnableContext().run(true, true, operation);
+				IStatus result = operation.getResult();
+				if (!result.isOK()) {
+					info(result.getMessage());
+					return IApplication.EXIT_OK;
+				}
+				//just exit after a successful update
+				if (!operation.isFirstInstall())
+					return IApplication.EXIT_OK;
+				if (description.isAutoStart())
+					launchProduct(description);
+				else {
+					//notify user that the product was installed
+					//TODO present the user an option to immediately start the product
+					info(result.getMessage());
+				}
+			} catch (InterruptedException e) {
+				//Nothing to do if the install was canceled
+			} catch (Exception e) {
+				IStatus error = getStatus(e);
+				advisor.reportStatus(error);
+				LogHelper.log(error);
+			}
+			return IApplication.EXIT_OK;
+		} finally {
+			advisor.stop();
+		}
+	}
+
+	/* (non-Javadoc)
+	 * @see org.eclipse.equinox.app.IApplication#stop()
+	 */
+	public void stop() {
+		//note this method can be called from another thread
+		InstallAdvisor tempContext = advisor;
+		if (tempContext != null) {
+			tempContext.stop();
+			advisor = null;
+		}
+	}
+}