| /******************************************************************************* |
| * Copyright (c) 2005, 2010 Cognos Incorporated, 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: |
| * Cognos Incorporated - initial API and implementation |
| * IBM Corporation - bug fixes and enhancements |
| *******************************************************************************/ |
| package org.eclipse.equinox.internal.cm; |
| |
| import java.io.IOException; |
| import java.lang.reflect.Array; |
| import java.util.*; |
| import org.osgi.framework.Bundle; |
| import org.osgi.framework.Constants; |
| import org.osgi.service.cm.*; |
| |
| /** |
| * ConfigurationImpl provides the Configuration implementation. |
| * The lock and unlock methods are used for synchronization. Operations outside of |
| * ConfigurationImpl that expect to have control of the lock should call checkLocked |
| */ |
| class ConfigurationImpl implements Configuration { |
| |
| private final ConfigurationAdminFactory configurationAdminFactory; |
| private final ConfigurationStore configurationStore; |
| /** @GuardedBy this*/ |
| private String bundleLocation; |
| private final String factoryPid; |
| private final String pid; |
| private ConfigurationDictionary dictionary; |
| /** @GuardedBy this*/ |
| private boolean deleted = false; |
| /** @GuardedBy this*/ |
| private Bundle boundBundle; |
| /** @GuardedBy this*/ |
| private int lockedCount = 0; |
| /** @GuardedBy this*/ |
| private Thread lockHolder = null; |
| |
| public ConfigurationImpl(ConfigurationAdminFactory configurationAdminFactory, ConfigurationStore configurationStore, String factoryPid, String pid, String bundleLocation) { |
| this.configurationAdminFactory = configurationAdminFactory; |
| this.configurationStore = configurationStore; |
| this.factoryPid = factoryPid; |
| this.pid = pid; |
| this.bundleLocation = bundleLocation; |
| } |
| |
| public ConfigurationImpl(ConfigurationAdminFactory configurationAdminFactory, ConfigurationStore configurationStore, Dictionary dictionary) { |
| this.configurationAdminFactory = configurationAdminFactory; |
| this.configurationStore = configurationStore; |
| pid = (String) dictionary.get(Constants.SERVICE_PID); |
| factoryPid = (String) dictionary.get(ConfigurationAdmin.SERVICE_FACTORYPID); |
| bundleLocation = (String) dictionary.get(ConfigurationAdmin.SERVICE_BUNDLELOCATION); |
| updateDictionary(dictionary); |
| } |
| |
| protected synchronized void lock() { |
| Thread current = Thread.currentThread(); |
| if (lockHolder != current) { |
| boolean interrupted = false; |
| try { |
| while (lockedCount != 0) |
| try { |
| wait(); |
| } catch (InterruptedException e) { |
| // although we don't handle an interrupt we should still |
| // save and restore the interrupt for others further up the stack |
| interrupted = true; |
| } |
| } finally { |
| if (interrupted) |
| current.interrupt(); // restore interrupted status |
| } |
| } |
| lockedCount++; |
| lockHolder = current; |
| } |
| |
| protected synchronized void unlock() { |
| Thread current = Thread.currentThread(); |
| if (lockHolder != current) |
| throw new IllegalStateException("Thread not lock owner"); //$NON-NLS-1$ |
| |
| lockedCount--; |
| if (lockedCount == 0) { |
| lockHolder = null; |
| notify(); |
| } |
| } |
| |
| protected synchronized void checkLocked() { |
| Thread current = Thread.currentThread(); |
| if (lockHolder != current) |
| throw new IllegalStateException("Thread not lock owner"); //$NON-NLS-1$ |
| } |
| |
| protected boolean bind(Bundle bundle) { |
| try { |
| lock(); |
| if (boundBundle == null && (bundleLocation == null || bundleLocation.equals(bundle.getLocation()))) |
| boundBundle = bundle; |
| return (boundBundle == bundle); |
| } finally { |
| unlock(); |
| } |
| } |
| |
| protected void unbind(Bundle bundle) { |
| try { |
| lock(); |
| if (boundBundle == bundle) |
| boundBundle = null; |
| } finally { |
| unlock(); |
| } |
| } |
| |
| public void delete() throws IOException { |
| try { |
| lock(); |
| checkDeleted(); |
| deleted = true; |
| configurationAdminFactory.notifyConfigurationDeleted(this, factoryPid != null); |
| configurationAdminFactory.dispatchEvent(ConfigurationEvent.CM_DELETED, factoryPid, pid); |
| } finally { |
| unlock(); |
| } |
| configurationStore.removeConfiguration(pid); |
| } |
| |
| private void checkDeleted() { |
| if (deleted) |
| throw new IllegalStateException("deleted"); //$NON-NLS-1$ |
| } |
| |
| public String getBundleLocation() { |
| return getBundleLocation(true); |
| } |
| |
| protected String getBundleLocation(boolean checkPermission) { |
| try { |
| lock(); |
| checkDeleted(); |
| if (checkPermission) |
| configurationAdminFactory.checkConfigurationPermission(); |
| if (bundleLocation != null) |
| return bundleLocation; |
| if (boundBundle != null) |
| return boundBundle.getLocation(); |
| return null; |
| } finally { |
| unlock(); |
| } |
| } |
| |
| protected String getFactoryPid(boolean checkDeleted) { |
| try { |
| lock(); |
| if (checkDeleted) |
| checkDeleted(); |
| return factoryPid; |
| } finally { |
| unlock(); |
| } |
| } |
| |
| public String getFactoryPid() { |
| return getFactoryPid(true); |
| } |
| |
| protected String getPid(boolean checkDeleted) { |
| try { |
| lock(); |
| if (checkDeleted) |
| checkDeleted(); |
| return pid; |
| } finally { |
| unlock(); |
| } |
| } |
| |
| public String getPid() { |
| return getPid(true); |
| } |
| |
| public Dictionary getProperties() { |
| try { |
| lock(); |
| checkDeleted(); |
| if (dictionary == null) |
| return null; |
| |
| Dictionary copy = dictionary.copy(); |
| copy.put(Constants.SERVICE_PID, pid); |
| if (factoryPid != null) |
| copy.put(ConfigurationAdmin.SERVICE_FACTORYPID, factoryPid); |
| |
| return copy; |
| } finally { |
| unlock(); |
| } |
| } |
| |
| protected Dictionary getAllProperties() { |
| try { |
| lock(); |
| if (deleted) |
| return null; |
| Dictionary copy = getProperties(); |
| if (copy == null) |
| return null; |
| String boundLocation = getBundleLocation(false); |
| if (boundLocation != null) |
| copy.put(ConfigurationAdmin.SERVICE_BUNDLELOCATION, boundLocation); |
| return copy; |
| } finally { |
| unlock(); |
| } |
| } |
| |
| public void setBundleLocation(String bundleLocation) { |
| try { |
| lock(); |
| checkDeleted(); |
| configurationAdminFactory.checkConfigurationPermission(); |
| this.bundleLocation = bundleLocation; |
| boundBundle = null; // always reset the boundBundle when setBundleLocation is called |
| } finally { |
| unlock(); |
| } |
| } |
| |
| public void update() throws IOException { |
| try { |
| lock(); |
| checkDeleted(); |
| if (dictionary == null) |
| dictionary = new ConfigurationDictionary(); |
| configurationStore.saveConfiguration(pid, this); |
| configurationAdminFactory.notifyConfigurationUpdated(this, factoryPid != null); |
| } finally { |
| unlock(); |
| } |
| } |
| |
| public void update(Dictionary properties) throws IOException { |
| try { |
| lock(); |
| checkDeleted(); |
| updateDictionary(properties); |
| configurationStore.saveConfiguration(pid, this); |
| configurationAdminFactory.notifyConfigurationUpdated(this, factoryPid != null); |
| configurationAdminFactory.dispatchEvent(ConfigurationEvent.CM_UPDATED, factoryPid, pid); |
| } finally { |
| unlock(); |
| } |
| } |
| |
| private void updateDictionary(Dictionary properties) { |
| ConfigurationDictionary newDictionary = new ConfigurationDictionary(); |
| Enumeration keys = properties.keys(); |
| while (keys.hasMoreElements()) { |
| Object key = keys.nextElement(); |
| if (newDictionary.get(key) == null) { |
| Object value = properties.get(key); |
| if (value.getClass().isArray()) { |
| int arrayLength = Array.getLength(value); |
| Object copyOfArray = Array.newInstance(value.getClass().getComponentType(), arrayLength); |
| System.arraycopy(value, 0, copyOfArray, 0, arrayLength); |
| newDictionary.put(key, copyOfArray); |
| } else if (value instanceof Collection) |
| newDictionary.put(key, new Vector((Collection) value)); |
| else |
| newDictionary.put(key, properties.get(key)); |
| } else |
| throw new IllegalArgumentException(key + " is already present or is a case variant."); //$NON-NLS-1$ |
| } |
| newDictionary.remove(Constants.SERVICE_PID); |
| newDictionary.remove(ConfigurationAdmin.SERVICE_FACTORYPID); |
| newDictionary.remove(ConfigurationAdmin.SERVICE_BUNDLELOCATION); |
| |
| dictionary = newDictionary; |
| } |
| |
| public boolean equals(Object obj) { |
| return (obj instanceof Configuration) && pid.equals(((Configuration) obj).getPid()); |
| } |
| |
| public int hashCode() { |
| return pid.hashCode(); |
| } |
| |
| protected boolean isDeleted() { |
| try { |
| lock(); |
| return deleted; |
| } finally { |
| unlock(); |
| } |
| } |
| } |