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290 lines
11 KiB
Java
290 lines
11 KiB
Java
/*
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* Copyright (c) 1999, 2026, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package com.sun.jndi.ldap;
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import javax.naming.*;
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import javax.naming.directory.*;
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import javax.naming.event.*;
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import javax.naming.ldap.*;
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import javax.naming.ldap.LdapName;
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import java.util.Vector;
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import com.sun.jndi.toolkit.ctx.Continuation;
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import jdk.internal.misc.InnocuousThread;
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/**
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* Gathers information to generate events by using the Persistent Search
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* control.
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*<p>
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* This class maintains a list of listeners all interested in the same
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* "search" request. It creates a thread that does the persistent search
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* and blocks, collecting the results of the search.
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* For each result that it receives from the search, it fires the
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* corresponding event to its listeners. If an exception is encountered,
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* it fires a NamingExceptionEvent.
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*
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* @author Rosanna Lee
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*/
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final class NamingEventNotifier implements Runnable {
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private static final boolean debug = false;
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private Vector<NamingListener> namingListeners;
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private Thread worker;
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private LdapCtx context;
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private EventContext eventSrc;
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private EventSupport support;
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private NamingEnumeration<SearchResult> results;
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// package private; used by EventSupport to remove it
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NotifierArgs info;
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NamingEventNotifier(EventSupport support, LdapCtx ctx, NotifierArgs info,
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NamingListener firstListener) throws NamingException {
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this.info = info;
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this.support = support;
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Control psearch;
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try {
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psearch = new PersistentSearchControl(
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info.mask,
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true /* no info about original entry(s) */,
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true /* additional info about changes */,
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Control.CRITICAL);
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} catch (java.io.IOException e) {
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NamingException ne = new NamingException(
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"Problem creating persistent search control");
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ne.setRootCause(e);
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throw ne;
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}
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// Add psearch control to existing list
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context = (LdapCtx)ctx.newInstance(new Control[]{psearch});
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eventSrc = ctx;
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namingListeners = new Vector<>();
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namingListeners.addElement(firstListener);
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worker = InnocuousThread.newSystemThread("LDAP Event Notifier", this);
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worker.setDaemon(true); // not a user thread
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worker.start();
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}
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// package private; used by EventSupport; namingListener already synchronized
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void addNamingListener(NamingListener l) {
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namingListeners.addElement(l);
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}
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// package private; used by EventSupport; namingListener already synchronized
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void removeNamingListener(NamingListener l) {
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namingListeners.removeElement(l);
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}
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// package private; used by EventSupport; namingListener already synchronized
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boolean hasNamingListeners() {
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return namingListeners.size() > 0;
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}
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/**
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* Execute "persistent search".
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* For each result, create the appropriate NamingEvent and
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* queue to be dispatched to listeners.
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*/
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@Override
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public void run() {
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try {
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Continuation cont = new Continuation();
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cont.setError(this, info.name);
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Name nm = (info.name == null || info.name.isEmpty()) ?
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new CompositeName() : new CompositeName().add(info.name);
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results = context.searchAux(nm, info.filter, info.controls,
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true, false, cont);
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// Change root of search results so that it will generate
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// names relative to the event context instead of that
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// named by nm
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((LdapSearchEnumeration)(NamingEnumeration)results)
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.setStartName(context.currentParsedDN);
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SearchResult si;
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Control[] respctls;
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EntryChangeResponseControl ec;
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long changeNum;
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while (results.hasMore()) {
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si = results.next();
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respctls = (si instanceof HasControls) ?
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((HasControls) si).getControls() : null;
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if (debug) {
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System.err.println("notifier: " + si);
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System.err.println("respCtls: " + respctls);
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}
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// Just process ECs; ignore all the rest
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if (respctls != null) {
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for (int i = 0; i < respctls.length; i++) {
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// %%% Should be checking OID instead of class
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// %%% in case using someone else's EC ctl
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if (respctls[i] instanceof EntryChangeResponseControl) {
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ec = (EntryChangeResponseControl)respctls[i];
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changeNum = ec.getChangeNumber();
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switch (ec.getChangeType()) {
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case EntryChangeResponseControl.ADD:
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fireObjectAdded(si, changeNum);
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break;
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case EntryChangeResponseControl.DELETE:
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fireObjectRemoved(si, changeNum);
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break;
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case EntryChangeResponseControl.MODIFY:
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fireObjectChanged(si, changeNum);
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break;
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case EntryChangeResponseControl.RENAME:
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fireObjectRenamed(si, ec.getPreviousDN(),
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changeNum);
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break;
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}
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}
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break;
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}
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}
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}
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} catch (InterruptedNamingException e) {
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if (debug) System.err.println("NamingEventNotifier Interrupted");
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} catch (NamingException e) {
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// Fire event to notify NamingExceptionEvent listeners
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fireNamingException(e);
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// This notifier is no longer valid
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support.removeDeadNotifier(info);
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} finally {
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cleanup();
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}
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if (debug) System.err.println("NamingEventNotifier finished");
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}
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private void cleanup() {
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if (debug) System.err.println("NamingEventNotifier cleanup");
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try {
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if (results != null) {
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if (debug) System.err.println("NamingEventNotifier enum closing");
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results.close(); // this will abandon the search
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results = null;
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}
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if (context != null) {
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if (debug) System.err.println("NamingEventNotifier ctx closing");
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context.close();
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context = null;
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}
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} catch (NamingException e) {}
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}
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/**
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* Stop the dispatcher so we can be destroyed.
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* package private; used by EventSupport
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*/
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void stop() {
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if (debug) System.err.println("NamingEventNotifier being stopping");
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if (worker != null) {
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worker.interrupt(); // kill our thread
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worker = null;
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}
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}
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/**
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* Fire an "object added" event to registered NamingListeners.
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*/
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private void fireObjectAdded(Binding newBd, long changeID) {
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if (namingListeners == null || namingListeners.size() == 0)
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return;
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NamingEvent e = new NamingEvent(eventSrc, NamingEvent.OBJECT_ADDED,
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newBd, null, changeID);
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support.queueEvent(e, namingListeners);
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}
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/**
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* Fire an "object removed" event to registered NamingListeners.
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*/
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private void fireObjectRemoved(Binding oldBd, long changeID) {
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if (namingListeners == null || namingListeners.size() == 0)
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return;
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NamingEvent e = new NamingEvent(eventSrc, NamingEvent.OBJECT_REMOVED,
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null, oldBd, changeID);
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support.queueEvent(e, namingListeners);
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}
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/**
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* Fires an "object changed" event to registered NamingListeners.
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*/
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private void fireObjectChanged(Binding newBd, long changeID) {
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if (namingListeners == null || namingListeners.size() == 0)
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return;
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// Name hasn't changed; construct old binding using name from new binding
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Binding oldBd = new Binding(newBd.getName(), null, newBd.isRelative());
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NamingEvent e = new NamingEvent(
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eventSrc, NamingEvent.OBJECT_CHANGED, newBd, oldBd, changeID);
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support.queueEvent(e, namingListeners);
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}
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/**
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* Fires an "object renamed" to registered NamingListeners.
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*/
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private void fireObjectRenamed(Binding newBd, String oldDN, long changeID) {
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if (namingListeners == null || namingListeners.size() == 0)
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return;
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Binding oldBd = null;
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try {
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LdapName dn = new LdapName(oldDN);
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if (dn.startsWith(context.currentParsedDN)) {
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String relDN = dn.getSuffix(context.currentParsedDN.size()).toString();
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oldBd = new Binding(relDN, null);
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}
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} catch (NamingException e) {}
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if (oldBd == null) {
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oldBd = new Binding(oldDN, null, false /* not relative name */);
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}
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NamingEvent e = new NamingEvent(
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eventSrc, NamingEvent.OBJECT_RENAMED, newBd, oldBd, changeID);
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support.queueEvent(e, namingListeners);
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}
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private void fireNamingException(NamingException e) {
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if (namingListeners == null || namingListeners.size() == 0)
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return;
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NamingExceptionEvent evt = new NamingExceptionEvent(eventSrc, e);
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support.queueEvent(evt, namingListeners);
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}
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}
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