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290
java/org/apache/catalina/session/StoreBase.java
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290
java/org/apache/catalina/session/StoreBase.java
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/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.catalina.session;
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import java.beans.PropertyChangeListener;
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import java.beans.PropertyChangeSupport;
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import java.io.BufferedInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.ObjectInputStream;
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import org.apache.catalina.LifecycleException;
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import org.apache.catalina.LifecycleState;
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import org.apache.catalina.Manager;
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import org.apache.catalina.Store;
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import org.apache.catalina.util.CustomObjectInputStream;
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import org.apache.catalina.util.LifecycleBase;
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import org.apache.tomcat.util.res.StringManager;
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/**
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* Abstract implementation of the {@link Store} interface to
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* support most of the functionality required by a {@link Store}.
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*
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* @author Bip Thelin
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*/
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public abstract class StoreBase extends LifecycleBase implements Store {
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// ----------------------------------------------------- Instance Variables
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/**
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* Name to register for this Store, used for logging.
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*/
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protected static final String storeName = "StoreBase";
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/**
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* The property change support for this component.
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*/
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protected final PropertyChangeSupport support = new PropertyChangeSupport(this);
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/**
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* The string manager for this package.
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*/
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protected static final StringManager sm = StringManager.getManager(StoreBase.class);
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/**
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* The Manager with which this Store is associated.
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*/
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protected Manager manager;
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// ------------------------------------------------------------- Properties
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/**
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* @return the name for this Store, used for logging.
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*/
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public String getStoreName() {
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return storeName;
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}
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/**
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* Set the Manager with which this Store is associated.
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*
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* @param manager The newly associated Manager
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*/
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@Override
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public void setManager(Manager manager) {
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Manager oldManager = this.manager;
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this.manager = manager;
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support.firePropertyChange("manager", oldManager, this.manager);
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}
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/**
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* @return the Manager with which the Store is associated.
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*/
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@Override
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public Manager getManager() {
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return this.manager;
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}
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// --------------------------------------------------------- Public Methods
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/**
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* Add a property change listener to this component.
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*
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* @param listener a value of type {@link PropertyChangeListener}
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*/
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@Override
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public void addPropertyChangeListener(PropertyChangeListener listener) {
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support.addPropertyChangeListener(listener);
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}
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/**
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* Remove a property change listener from this component.
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*
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* @param listener The listener to remove
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*/
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@Override
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public void removePropertyChangeListener(PropertyChangeListener listener) {
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support.removePropertyChangeListener(listener);
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}
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/**
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* Get only those keys of sessions, that are saved in the Store and are to
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* be expired.
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*
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* @return list of session keys, that are to be expired
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* @throws IOException
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* if an input-/output error occurred
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*/
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public String[] expiredKeys() throws IOException {
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return keys();
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}
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/**
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* Called by our background reaper thread to check if Sessions
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* saved in our store are subject of being expired. If so expire
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* the Session and remove it from the Store.
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*
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*/
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public void processExpires() {
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String[] keys = null;
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if(!getState().isAvailable()) {
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return;
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}
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try {
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keys = expiredKeys();
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} catch (IOException e) {
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manager.getContext().getLogger().error("Error getting keys", e);
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return;
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}
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if (manager.getContext().getLogger().isDebugEnabled()) {
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manager.getContext().getLogger().debug(getStoreName()+ ": processExpires check number of " + keys.length + " sessions" );
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}
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long timeNow = System.currentTimeMillis();
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for (int i = 0; i < keys.length; i++) {
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try {
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StandardSession session = (StandardSession) load(keys[i]);
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if (session == null) {
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continue;
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}
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int timeIdle = (int) ((timeNow - session.getThisAccessedTime()) / 1000L);
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if (timeIdle < session.getMaxInactiveInterval()) {
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continue;
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}
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if (manager.getContext().getLogger().isDebugEnabled()) {
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manager.getContext().getLogger().debug(getStoreName()+ ": processExpires expire store session " + keys[i] );
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}
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boolean isLoaded = false;
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if (manager instanceof PersistentManagerBase) {
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isLoaded = ((PersistentManagerBase) manager).isLoaded(keys[i]);
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} else {
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try {
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if (manager.findSession(keys[i]) != null) {
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isLoaded = true;
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}
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} catch (IOException ioe) {
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// Ignore - session will be expired
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}
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}
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if (isLoaded) {
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// recycle old backup session
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session.recycle();
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} else {
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// expire swapped out session
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session.expire();
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}
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remove(keys[i]);
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} catch (Exception e) {
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manager.getContext().getLogger().error("Session: "+keys[i]+"; ", e);
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try {
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remove(keys[i]);
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} catch (IOException e2) {
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manager.getContext().getLogger().error("Error removing key", e2);
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}
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}
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}
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}
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// --------------------------------------------------------- Protected Methods
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/**
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* Create the object input stream to use to read a session from the store.
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* Sub-classes <b>must</b> have set the thread context class loader before
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* calling this method.
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*
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* @param is The input stream provided by the sub-class that will provide
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* the data for a session
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*
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* @return An appropriately configured ObjectInputStream from which the
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* session can be read.
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*
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* @throws IOException if a problem occurs creating the ObjectInputStream
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*/
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protected ObjectInputStream getObjectInputStream(InputStream is) throws IOException {
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BufferedInputStream bis = new BufferedInputStream(is);
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CustomObjectInputStream ois;
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ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
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if (manager instanceof ManagerBase) {
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ManagerBase managerBase = (ManagerBase) manager;
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ois = new CustomObjectInputStream(bis, classLoader, manager.getContext().getLogger(),
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managerBase.getSessionAttributeValueClassNamePattern(),
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managerBase.getWarnOnSessionAttributeFilterFailure());
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} else {
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ois = new CustomObjectInputStream(bis, classLoader);
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}
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return ois;
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}
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@Override
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protected void initInternal() {
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// NOOP
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}
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/**
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* Start this component and implement the requirements
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* of {@link LifecycleBase#startInternal()}.
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*
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* @exception LifecycleException if this component detects a fatal error
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* that prevents this component from being used
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*/
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@Override
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protected synchronized void startInternal() throws LifecycleException {
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setState(LifecycleState.STARTING);
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}
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/**
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* Stop this component and implement the requirements
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* of {@link LifecycleBase#stopInternal()}.
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*
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* @exception LifecycleException if this component detects a fatal error
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* that prevents this component from being used
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*/
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@Override
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protected synchronized void stopInternal() throws LifecycleException {
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setState(LifecycleState.STOPPING);
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}
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@Override
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protected void destroyInternal() {
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// NOOP
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}
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/**
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* @return a String rendering of this object.
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*/
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@Override
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public String toString() {
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StringBuilder sb = new StringBuilder(this.getClass().getName());
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sb.append('[');
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if (manager == null) {
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sb.append("Manager is null");
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} else {
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sb.append(manager);
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}
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sb.append(']');
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return sb.toString();
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}
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}
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