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Replaced Map synchronization with ConcurrentHashMap to avoid session access deadlocks 

Issue: SPR-10436
(cherry picked from commit cd3d0c3)
This commit is contained in:
Juergen Hoeller 2013-05-16 13:50:58 +02:00
parent 10c0e8af01
commit 115442242f
2 changed files with 35 additions and 56 deletions
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44
spring-web/src/main/java/org/springframework/web/context/request/ServletRequestAttributes.java
View File

@ -1,5 +1,5 @@
/*
* Copyright 2002-2012 the original author or authors.
* Copyright 2002-2013 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -16,8 +16,8 @@
package org.springframework.web.context.request;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
@ -50,7 +50,7 @@ public class ServletRequestAttributes extends AbstractRequestAttributes {
private volatile HttpSession session;
private final Map<String, Object> sessionAttributesToUpdate = new HashMap<String, Object>();
private final Map<String, Object> sessionAttributesToUpdate = new ConcurrentHashMap<String, Object>(1);
/**
@ -103,9 +103,7 @@ public class ServletRequestAttributes extends AbstractRequestAttributes {
try {
Object value = session.getAttribute(name);
if (value != null) {
synchronized (this.sessionAttributesToUpdate) {
this.sessionAttributesToUpdate.put(name, value);
}
this.sessionAttributesToUpdate.put(name, value);
}
return value;
}
@ -127,9 +125,7 @@ public class ServletRequestAttributes extends AbstractRequestAttributes {
}
else {
HttpSession session = getSession(true);
synchronized (this.sessionAttributesToUpdate) {
this.sessionAttributesToUpdate.remove(name);
}
this.sessionAttributesToUpdate.remove(name);
session.setAttribute(name, value);
}
}
@ -144,9 +140,7 @@ public class ServletRequestAttributes extends AbstractRequestAttributes {
else {
HttpSession session = getSession(false);
if (session != null) {
synchronized (this.sessionAttributesToUpdate) {
this.sessionAttributesToUpdate.remove(name);
}
this.sessionAttributesToUpdate.remove(name);
try {
session.removeAttribute(name);
// Remove any registered destruction callback as well.
@ -220,24 +214,22 @@ public class ServletRequestAttributes extends AbstractRequestAttributes {
// Store session reference for access after request completion.
this.session = this.request.getSession(false);
// Update all affected session attributes.
synchronized (this.sessionAttributesToUpdate) {
if (this.session != null) {
try {
for (Map.Entry<String, Object> entry : this.sessionAttributesToUpdate.entrySet()) {
String name = entry.getKey();
Object newValue = entry.getValue();
Object oldValue = this.session.getAttribute(name);
if (oldValue == newValue) {
this.session.setAttribute(name, newValue);
}
if (this.session != null) {
try {
for (Map.Entry<String, Object> entry : this.sessionAttributesToUpdate.entrySet()) {
String name = entry.getKey();
Object newValue = entry.getValue();
Object oldValue = this.session.getAttribute(name);
if (oldValue == newValue) {
this.session.setAttribute(name, newValue);
}
}
catch (IllegalStateException ex) {
// Session invalidated - shouldn't usually happen.
}
}
this.sessionAttributesToUpdate.clear();
catch (IllegalStateException ex) {
// Session invalidated - shouldn't usually happen.
}
}
this.sessionAttributesToUpdate.clear();
}
/**

47
spring-webmvc-portlet/src/main/java/org/springframework/web/portlet/context/PortletRequestAttributes.java
View File

@ -1,5 +1,5 @@
/*
* Copyright 2002-2012 the original author or authors.
* Copyright 2002-2013 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -16,8 +16,8 @@
package org.springframework.web.portlet.context;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import javax.portlet.PortletRequest;
import javax.portlet.PortletSession;
@ -59,9 +59,9 @@ public class PortletRequestAttributes extends AbstractRequestAttributes {
private volatile PortletSession session;
private final Map<String, Object> sessionAttributesToUpdate = new HashMap<String, Object>();
private final Map<String, Object> sessionAttributesToUpdate = new ConcurrentHashMap<String, Object>(1);
private final Map<String, Object> globalSessionAttributesToUpdate = new HashMap<String, Object>();
private final Map<String, Object> globalSessionAttributesToUpdate = new ConcurrentHashMap<String, Object>(1);
/**
@ -114,18 +114,14 @@ public class PortletRequestAttributes extends AbstractRequestAttributes {
if (scope == SCOPE_GLOBAL_SESSION) {
Object value = session.getAttribute(name, PortletSession.APPLICATION_SCOPE);
if (value != null) {
synchronized (this.globalSessionAttributesToUpdate) {
this.globalSessionAttributesToUpdate.put(name, value);
}
this.globalSessionAttributesToUpdate.put(name, value);
}
return value;
}
else {
Object value = session.getAttribute(name);
if (value != null) {
synchronized (this.sessionAttributesToUpdate) {
this.sessionAttributesToUpdate.put(name, value);
}
this.sessionAttributesToUpdate.put(name, value);
}
return value;
}
@ -148,15 +144,11 @@ public class PortletRequestAttributes extends AbstractRequestAttributes {
PortletSession session = getSession(true);
if (scope == SCOPE_GLOBAL_SESSION) {
session.setAttribute(name, value, PortletSession.APPLICATION_SCOPE);
synchronized (this.globalSessionAttributesToUpdate) {
this.globalSessionAttributesToUpdate.remove(name);
}
this.globalSessionAttributesToUpdate.remove(name);
}
else {
session.setAttribute(name, value);
synchronized (this.sessionAttributesToUpdate) {
this.sessionAttributesToUpdate.remove(name);
}
this.sessionAttributesToUpdate.remove(name);
}
}
}
@ -173,15 +165,11 @@ public class PortletRequestAttributes extends AbstractRequestAttributes {
if (session != null) {
if (scope == SCOPE_GLOBAL_SESSION) {
session.removeAttribute(name, PortletSession.APPLICATION_SCOPE);
synchronized (this.globalSessionAttributesToUpdate) {
this.globalSessionAttributesToUpdate.remove(name);
}
this.globalSessionAttributesToUpdate.remove(name);
}
else {
session.removeAttribute(name);
synchronized (this.sessionAttributesToUpdate) {
this.sessionAttributesToUpdate.remove(name);
}
this.sessionAttributesToUpdate.remove(name);
}
}
}
@ -248,8 +236,8 @@ public class PortletRequestAttributes extends AbstractRequestAttributes {
@Override
protected void updateAccessedSessionAttributes() {
this.session = this.request.getPortletSession(false);
synchronized (this.sessionAttributesToUpdate) {
if (this.session != null) {
if (this.session != null) {
try {
for (Map.Entry<String, Object> entry : this.sessionAttributesToUpdate.entrySet()) {
String name = entry.getKey();
Object newValue = entry.getValue();
@ -258,11 +246,6 @@ public class PortletRequestAttributes extends AbstractRequestAttributes {
this.session.setAttribute(name, newValue);
}
}
}
this.sessionAttributesToUpdate.clear();
}
synchronized (this.globalSessionAttributesToUpdate) {
if (this.session != null) {
for (Map.Entry<String, Object> entry : this.globalSessionAttributesToUpdate.entrySet()) {
String name = entry.getKey();
Object newValue = entry.getValue();
@ -272,8 +255,12 @@ public class PortletRequestAttributes extends AbstractRequestAttributes {
}
}
}
this.globalSessionAttributesToUpdate.clear();
catch (IllegalStateException ex) {
// Session invalidated - shouldn't usually happen.
}
}
this.sessionAttributesToUpdate.clear();
this.globalSessionAttributesToUpdate.clear();
}
/**