org.csstudio.iter.pydev.configurator.EarlyStartup.java Source code

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Here is the source code for org.csstudio.iter.pydev.configurator.EarlyStartup.java

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/*******************************************************************************
 * Copyright (c) 2010-2014 ITER Organization.
 * 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
 ******************************************************************************/
package org.csstudio.iter.pydev.configurator;

import java.io.File;
import java.io.IOException;
import java.util.logging.Filter;
import java.util.logging.Handler;
import java.util.logging.LogRecord;
import java.util.logging.Logger;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.core.runtime.preferences.IPreferencesService;
import org.eclipse.core.runtime.preferences.InstanceScope;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.IStartup;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.preferences.ScopedPreferenceStore;

public class EarlyStartup implements IStartup {

    private static final String[] HIDE_MESSAGE_STARTS_WITH = new String[] { "Restoring info for",
            "Finished restoring information for", "Info: Rebuilding internal caches:",
            "Plug-in 'org.python.pydev' contributed an invalid Menu Extension" };

    private static Pattern SCAN_JYTHON_PLUGIN_PATH_PATTERN = Pattern
            .compile(".*/org\\.csstudio\\.scan(_[^/]*)?/jython");

    private static class HideUnWantedLogFilter implements Filter {

        private Filter previousFilter;

        public HideUnWantedLogFilter(Filter previousFilter) {
            this.previousFilter = previousFilter;
        }

        @Override
        public boolean isLoggable(LogRecord record) {
            if (record.getMessage() != null) {
                for (String hideMsgStartsWith : HIDE_MESSAGE_STARTS_WITH) {
                    if (record.getMessage().startsWith(hideMsgStartsWith)) {
                        return false;
                    }
                }
            }
            if (previousFilter == null) {
                return true;
            }
            return previousFilter.isLoggable(record);
        }
    };

    private void removeUnWantedLog() {
        // Hide unwanted message from log
        Logger rootLogger = Logger.getLogger("");
        rootLogger.setFilter(new HideUnWantedLogFilter(rootLogger.getFilter()));
        for (Handler handler : rootLogger.getHandlers()) {
            handler.setFilter(new HideUnWantedLogFilter(handler.getFilter()));
        }
    }

    private boolean updateOpiBuilderPythonPath() throws IOException {
        File scanPluginDir = BundleUtils.getBundleLocation("org.csstudio.scan");
        final File scanJythonLibDir = new File(scanPluginDir, "jython");
        if (scanJythonLibDir.exists()) {
            final IPreferencesService prefs = Platform.getPreferencesService();

            StringBuilder newPythonPaths = new StringBuilder();
            newPythonPaths.append(scanJythonLibDir.getCanonicalPath());
            newPythonPaths.append('|');

            String oldPythonPathString = prefs.getString("org.csstudio.opibuilder", "python_path", "", null);
            String[] oldPythonPaths = oldPythonPathString.split("\\|");
            for (String oldPythonPath : oldPythonPaths) {
                if (!"".equals(oldPythonPath.trim())) {
                    Matcher m = SCAN_JYTHON_PLUGIN_PATH_PATTERN.matcher(oldPythonPath.trim());
                    if (!m.matches()) {
                        newPythonPaths.append(oldPythonPath);
                        newPythonPaths.append('|');
                    }
                }
            }
            String newPythonPathString = newPythonPaths.substring(0, newPythonPaths.length() - 1);
            if (!oldPythonPathString.equals(newPythonPathString)) {
                final ScopedPreferenceStore prefStore = new ScopedPreferenceStore(InstanceScope.INSTANCE,
                        "org.csstudio.opibuilder");
                prefStore.setValue("python_path", newPythonPathString);
                prefStore.save();
                return true;
            }
        }
        return false;
    }

    @Override
    public void earlyStartup() {
        Job job = new Job("Configure python executable") {
            @Override
            protected IStatus run(IProgressMonitor monitor) {
                removeUnWantedLog();
                boolean confChanged = false;
                try {
                    boolean changed = InterpreterUtils.createPythonInterpreter("default_python", monitor);
                    confChanged |= changed;
                } catch (Exception e) {
                    e.printStackTrace();
                }
                try {
                    boolean changed = InterpreterUtils.createJythonInterpreter("default_jython", monitor);
                    confChanged |= changed;
                } catch (Exception e) {
                    e.printStackTrace();
                }

                try {
                    boolean changed = updateOpiBuilderPythonPath();
                    confChanged |= changed;
                } catch (Exception e) {
                    e.printStackTrace();
                }

                if (confChanged) {
                    Display.getDefault().asyncExec(new Runnable() {
                        @Override
                        public void run() {
                            MessageDialog dialog = new MessageDialog(null, "Restart required", null,
                                    "Python Configuration has been updated automatically and requires a restart.",
                                    MessageDialog.QUESTION, new String[] { "Restart Now", "Restart Later" }, 0);
                            int result = dialog.open();
                            if (result == 0) {
                                PlatformUI.getWorkbench().restart();
                            }
                        }
                    });
                }

                return Status.OK_STATUS;
            }
        };
        job.schedule();
    }
}