| /* |
| * Copyright (c) 2003 The Visigoth Software Society. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, if |
| * any, must include the following acknowledgement: |
| * "This product includes software developed by the |
| * Visigoth Software Society (http://www.visigoths.org/)." |
| * Alternately, this acknowledgement may appear in the software itself, |
| * if and wherever such third-party acknowledgements normally appear. |
| * |
| * 4. Neither the name "FreeMarker", "Visigoth", nor any of the names of the |
| * project contributors may be used to endorse or promote products derived |
| * from this software without prior written permission. For written |
| * permission, please contact visigoths@visigoths.org. |
| * |
| * 5. Products derived from this software may not be called "FreeMarker" or "Visigoth" |
| * nor may "FreeMarker" or "Visigoth" appear in their names |
| * without prior written permission of the Visigoth Software Society. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE VISIGOTH SOFTWARE SOCIETY OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Visigoth Software Society. For more |
| * information on the Visigoth Software Society, please see |
| * http://www.visigoths.org/ |
| */ |
| |
| package freemarker.debug.impl; |
| |
| import java.io.Serializable; |
| import java.lang.ref.ReferenceQueue; |
| import java.lang.ref.WeakReference; |
| import java.rmi.RemoteException; |
| import java.rmi.server.RemoteObject; |
| import java.rmi.server.UnicastRemoteObject; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Enumeration; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| |
| import freemarker.core.DebugBreak; |
| import freemarker.core.Environment; |
| import freemarker.core.TemplateElement; |
| import freemarker.debug.Breakpoint; |
| import freemarker.debug.DebuggerListener; |
| import freemarker.debug.EnvironmentSuspendedEvent; |
| import freemarker.template.Template; |
| import freemarker.template.utility.UndeclaredThrowableException; |
| |
| /** |
| * @author Attila Szegedi |
| * @version $Id |
| */ |
| class RmiDebuggerService |
| extends |
| DebuggerService |
| { |
| private final Map templateDebugInfos = new HashMap(); |
| private final HashSet suspendedEnvironments = new HashSet(); |
| private final Map listeners = new HashMap(); |
| private final ReferenceQueue refQueue = new ReferenceQueue(); |
| |
| |
| private final RmiDebuggerImpl debugger; |
| private DebuggerServer server; |
| |
| RmiDebuggerService() |
| { |
| try |
| { |
| debugger = new RmiDebuggerImpl(this); |
| server = new DebuggerServer((Serializable)RemoteObject.toStub(debugger)); |
| server.start(); |
| } |
| catch(RemoteException e) |
| { |
| e.printStackTrace(); |
| throw new UndeclaredThrowableException(e); |
| } |
| } |
| |
| List getBreakpointsSpi(String templateName) |
| { |
| synchronized(templateDebugInfos) |
| { |
| TemplateDebugInfo tdi = findTemplateDebugInfo(templateName); |
| return tdi == null ? Collections.EMPTY_LIST : tdi.breakpoints; |
| } |
| } |
| |
| List getBreakpointsSpi() |
| { |
| List sumlist = new ArrayList(); |
| synchronized(templateDebugInfos) |
| { |
| for (Iterator iter = templateDebugInfos.values().iterator(); iter.hasNext();) |
| { |
| sumlist.addAll(((TemplateDebugInfo) iter.next()).breakpoints); |
| } |
| } |
| Collections.sort(sumlist); |
| return sumlist; |
| } |
| |
| boolean suspendEnvironmentSpi(Environment env, String templateName, int line) |
| throws |
| RemoteException |
| { |
| RmiDebuggedEnvironmentImpl denv = |
| (RmiDebuggedEnvironmentImpl) |
| RmiDebuggedEnvironmentImpl.getCachedWrapperFor(env); |
| |
| synchronized(suspendedEnvironments) |
| { |
| suspendedEnvironments.add(denv); |
| } |
| try |
| { |
| EnvironmentSuspendedEvent breakpointEvent = |
| new EnvironmentSuspendedEvent(this, templateName, line, denv); |
| |
| synchronized(listeners) |
| { |
| for (Iterator iter = listeners.values().iterator(); iter.hasNext();) |
| { |
| DebuggerListener listener = (DebuggerListener) iter.next(); |
| listener.environmentSuspended(breakpointEvent); |
| } |
| } |
| synchronized(denv) |
| { |
| try |
| { |
| denv.wait(); |
| } |
| catch(InterruptedException e) |
| { |
| ;// Intentionally ignored |
| } |
| } |
| return denv.isStopped(); |
| } |
| finally |
| { |
| synchronized(suspendedEnvironments) |
| { |
| suspendedEnvironments.remove(denv); |
| } |
| } |
| } |
| |
| void registerTemplateSpi(Template template) |
| { |
| String templateName = template.getName(); |
| synchronized(templateDebugInfos) |
| { |
| TemplateDebugInfo tdi = createTemplateDebugInfo(templateName); |
| tdi.templates.add(new TemplateReference(templateName, template, refQueue)); |
| // Inject already defined breakpoints into the template |
| for (Iterator iter = tdi.breakpoints.iterator(); iter.hasNext();) |
| { |
| Breakpoint breakpoint = (Breakpoint) iter.next(); |
| insertDebugBreak(template, breakpoint); |
| } |
| } |
| } |
| |
| Collection getSuspendedEnvironments() |
| { |
| return (Collection)suspendedEnvironments.clone(); |
| } |
| |
| Object addDebuggerListener(DebuggerListener listener) |
| { |
| Object id; |
| synchronized(listeners) |
| { |
| id = new Long(System.currentTimeMillis()); |
| listeners.put(id, listener); |
| } |
| return id; |
| } |
| |
| void removeDebuggerListener(Object id) |
| { |
| synchronized(listeners) |
| { |
| listeners.remove(id); |
| } |
| } |
| |
| void addBreakpoint(Breakpoint breakpoint) |
| { |
| String templateName = breakpoint.getTemplateName(); |
| synchronized(templateDebugInfos) |
| { |
| TemplateDebugInfo tdi = createTemplateDebugInfo(templateName); |
| List breakpoints = tdi.breakpoints; |
| int pos = Collections.binarySearch(breakpoints, breakpoint); |
| if(pos < 0) |
| { |
| // Add to the list of breakpoints |
| breakpoints.add(-pos - 1, breakpoint); |
| // Inject the breakpoint into all templates with this name |
| for (Iterator iter = tdi.templates.iterator(); iter.hasNext();) |
| { |
| TemplateReference ref = (TemplateReference) iter.next(); |
| Template t = ref.getTemplate(); |
| if(t == null) |
| { |
| iter.remove(); |
| } |
| else |
| { |
| insertDebugBreak(t, breakpoint); |
| } |
| } |
| } |
| } |
| } |
| |
| private static void insertDebugBreak(Template t, Breakpoint breakpoint) |
| { |
| TemplateElement te = findTemplateElement(t.getRootTreeNode(), breakpoint.getLine()); |
| if(te == null) |
| { |
| return; |
| } |
| TemplateElement parent = (TemplateElement)te.getParent(); |
| DebugBreak db = new DebugBreak(te); |
| // TODO: Ensure there always is a parent by making sure |
| // that the root element in the template is always a MixedContent |
| // Also make sure it doesn't conflict with anyone's code. |
| parent.setChildAt(parent.getIndex(te), db); |
| } |
| |
| private static TemplateElement findTemplateElement(TemplateElement te, int line) |
| { |
| if(te.getBeginLine() > line || te.getEndLine() < line) |
| { |
| return null; |
| } |
| // Find the narrowest match |
| List childMatches = new ArrayList(); |
| for(Enumeration children = te.children(); children.hasMoreElements();) |
| { |
| TemplateElement child = (TemplateElement)children.nextElement(); |
| TemplateElement childmatch = findTemplateElement(child, line); |
| if(childmatch != null) |
| { |
| childMatches.add(childmatch); |
| } |
| } |
| //find a match that exactly matches the begin/end line |
| TemplateElement bestMatch = null; |
| for(int i = 0; i < childMatches.size(); i++) |
| { |
| TemplateElement e = (TemplateElement) childMatches.get(i); |
| |
| if( bestMatch == null ) |
| { |
| bestMatch = e; |
| } |
| |
| if( e.getBeginLine() == line && e.getEndLine() > line ) |
| { |
| bestMatch = e; |
| } |
| |
| if( e.getBeginLine() == e.getEndLine() && e.getBeginLine() == line) |
| { |
| bestMatch = e; |
| break; |
| } |
| } |
| if( bestMatch != null) |
| { |
| return bestMatch; |
| } |
| // If no child provides narrower match, return this |
| return te; |
| } |
| |
| private TemplateDebugInfo findTemplateDebugInfo(String templateName) |
| { |
| processRefQueue(); |
| return (TemplateDebugInfo)templateDebugInfos.get(templateName); |
| } |
| |
| private TemplateDebugInfo createTemplateDebugInfo(String templateName) |
| { |
| TemplateDebugInfo tdi = findTemplateDebugInfo(templateName); |
| if(tdi == null) |
| { |
| tdi = new TemplateDebugInfo(); |
| templateDebugInfos.put(templateName, tdi); |
| } |
| return tdi; |
| } |
| |
| void removeBreakpoint(Breakpoint breakpoint) |
| { |
| String templateName = breakpoint.getTemplateName(); |
| synchronized(templateDebugInfos) |
| { |
| TemplateDebugInfo tdi = findTemplateDebugInfo(templateName); |
| if(tdi != null) |
| { |
| List breakpoints = tdi.breakpoints; |
| int pos = Collections.binarySearch(breakpoints, breakpoint); |
| if(pos >= 0) |
| { |
| breakpoints.remove(pos); |
| for (Iterator iter = tdi.templates.iterator(); iter.hasNext();) |
| { |
| TemplateReference ref = (TemplateReference) iter.next(); |
| Template t = ref.getTemplate(); |
| if(t == null) |
| { |
| iter.remove(); |
| } |
| else |
| { |
| removeDebugBreak(t, breakpoint); |
| } |
| } |
| } |
| if(tdi.isEmpty()) |
| { |
| templateDebugInfos.remove(templateName); |
| } |
| } |
| } |
| } |
| |
| private void removeDebugBreak(Template t, Breakpoint breakpoint) |
| { |
| TemplateElement te = findTemplateElement(t.getRootTreeNode(), breakpoint.getLine()); |
| if(te == null) |
| { |
| return; |
| } |
| DebugBreak db = null; |
| while(te != null) |
| { |
| if(te instanceof DebugBreak) |
| { |
| db = (DebugBreak)te; |
| break; |
| } |
| te = (TemplateElement)te.getParent(); |
| } |
| if(db == null) |
| { |
| return; |
| } |
| TemplateElement parent = (TemplateElement)db.getParent(); |
| parent.setChildAt(parent.getIndex(db), (TemplateElement)db.getChildAt(0)); |
| } |
| |
| void removeBreakpoints(String templateName) |
| { |
| synchronized(templateDebugInfos) |
| { |
| TemplateDebugInfo tdi = findTemplateDebugInfo(templateName); |
| if(tdi != null) |
| { |
| removeBreakpoints(tdi); |
| if(tdi.isEmpty()) |
| { |
| templateDebugInfos.remove(templateName); |
| } |
| } |
| } |
| } |
| |
| void removeBreakpoints() |
| { |
| synchronized(templateDebugInfos) |
| { |
| for (Iterator iter = templateDebugInfos.values().iterator(); iter.hasNext();) |
| { |
| TemplateDebugInfo tdi = (TemplateDebugInfo) iter.next(); |
| removeBreakpoints(tdi); |
| if(tdi.isEmpty()) |
| { |
| iter.remove(); |
| } |
| } |
| } |
| } |
| |
| private void removeBreakpoints(TemplateDebugInfo tdi) |
| { |
| tdi.breakpoints.clear(); |
| for (Iterator iter = tdi.templates.iterator(); iter.hasNext();) |
| { |
| TemplateReference ref = (TemplateReference) iter.next(); |
| Template t = ref.getTemplate(); |
| if(t == null) |
| { |
| iter.remove(); |
| } |
| else |
| { |
| removeDebugBreaks(t.getRootTreeNode()); |
| } |
| } |
| } |
| |
| private void removeDebugBreaks(TemplateElement te) |
| { |
| int count = te.getChildCount(); |
| for(int i = 0; i < count; ++i) |
| { |
| TemplateElement child = (TemplateElement)te.getChildAt(i); |
| while(child instanceof DebugBreak) |
| { |
| TemplateElement dbchild = (TemplateElement)child.getChildAt(0); |
| te.setChildAt(i, dbchild); |
| child = dbchild; |
| } |
| removeDebugBreaks(child); |
| } |
| } |
| |
| private static final class TemplateDebugInfo |
| { |
| final List templates = new ArrayList(); |
| final List breakpoints = new ArrayList(); |
| |
| boolean isEmpty() |
| { |
| return templates.isEmpty() && breakpoints.isEmpty(); |
| } |
| } |
| |
| private static final class TemplateReference extends WeakReference |
| { |
| final String templateName; |
| |
| TemplateReference(String templateName, Template template, ReferenceQueue queue) |
| { |
| super(template, queue); |
| this.templateName = templateName; |
| } |
| |
| Template getTemplate() |
| { |
| return (Template)get(); |
| } |
| } |
| |
| private void processRefQueue() |
| { |
| for(;;) |
| { |
| TemplateReference ref = (TemplateReference)refQueue.poll(); |
| if(ref == null) |
| { |
| break; |
| } |
| TemplateDebugInfo tdi = findTemplateDebugInfo(ref.templateName); |
| if(tdi != null) |
| { |
| tdi.templates.remove(ref); |
| if(tdi.isEmpty()) |
| { |
| templateDebugInfos.remove(ref.templateName); |
| } |
| } |
| } |
| } |
| |
| void shutdownSpi() |
| { |
| server.stop(); |
| try |
| { |
| UnicastRemoteObject.unexportObject(this.debugger, true); |
| } |
| catch(Exception e) |
| { |
| } |
| |
| RmiDebuggedEnvironmentImpl.cleanup(); |
| } |
| } |