Java Doc for CopyOnWriteArrayMap.java in  » Net » Terracotta » com » tc » util » concurrent » Java Source Code / Java DocumentationJava Source Code and Java Documentation

Java Source Code / Java Documentation
1. 6.0 JDK Core
2. 6.0 JDK Modules
3. 6.0 JDK Modules com.sun
4. 6.0 JDK Modules com.sun.java
5. 6.0 JDK Modules sun
6. 6.0 JDK Platform
7. Ajax
8. Apache Harmony Java SE
9. Aspect oriented
10. Authentication Authorization
11. Blogger System
12. Build
13. Byte Code
14. Cache
15. Chart
16. Chat
17. Code Analyzer
18. Collaboration
19. Content Management System
20. Database Client
21. Database DBMS
22. Database JDBC Connection Pool
23. Database ORM
24. Development
25. EJB Server geronimo
26. EJB Server GlassFish
27. EJB Server JBoss 4.2.1
28. EJB Server resin 3.1.5
29. ERP CRM Financial
30. ESB
31. Forum
32. GIS
33. Graphic Library
34. Groupware
35. HTML Parser
36. IDE
37. IDE Eclipse
38. IDE Netbeans
39. Installer
40. Internationalization Localization
41. Inversion of Control
42. Issue Tracking
43. J2EE
44. JBoss
45. JMS
46. JMX
47. Library
48. Mail Clients
49. Net
50. Parser
51. PDF
52. Portal
53. Profiler
54. Project Management
55. Report
56. RSS RDF
57. Rule Engine
58. Science
59. Scripting
60. Search Engine
61. Security
62. Sevlet Container
63. Source Control
64. Swing Library
65. Template Engine
66. Test Coverage
67. Testing
68. UML
69. Web Crawler
70. Web Framework
71. Web Mail
72. Web Server
73. Web Services
74. Web Services apache cxf 2.0.1
75. Web Services AXIS2
76. Wiki Engine
77. Workflow Engines
78. XML
79. XML UI
Java
Java Tutorial
Java Open Source
Jar File Download
Java Articles
Java Products
Java by API
Photoshop Tutorials
Maya Tutorials
Flash Tutorials
3ds-Max Tutorials
Illustrator Tutorials
GIMP Tutorials
C# / C Sharp
C# / CSharp Tutorial
C# / CSharp Open Source
ASP.Net
ASP.NET Tutorial
JavaScript DHTML
JavaScript Tutorial
JavaScript Reference
HTML / CSS
HTML CSS Reference
C / ANSI-C
C Tutorial
C++
C++ Tutorial
Ruby
PHP
Python
Python Tutorial
Python Open Source
SQL Server / T-SQL
SQL Server / T-SQL Tutorial
Oracle PL / SQL
Oracle PL/SQL Tutorial
PostgreSQL
SQL / MySQL
MySQL Tutorial
VB.Net
VB.Net Tutorial
Flash / Flex / ActionScript
VBA / Excel / Access / Word
XML
XML Tutorial
Microsoft Office PowerPoint 2007 Tutorial
Microsoft Office Excel 2007 Tutorial
Microsoft Office Word 2007 Tutorial
Java Source Code / Java Documentation » Net » Terracotta » com.tc.util.concurrent 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.util.Hashtable
   com.tc.util.concurrent.CopyOnWriteArrayMap

CopyOnWriteArrayMap
public class CopyOnWriteArrayMap extends Hashtable (Code)
This class provides a thread safe map interface (by extending Hashtable) and adds a way to easily and synchronously iterator over the list of values as an array. This map is very useful when you want a snap shot of the values to iterator over and dont want to hold up access to the map the whole time while you are iteratoring over the list to avoid concurrent modification exception.

For example : Hashtable t = .... for(Iterator i = t.values().iterator(); i.hashNext(); ) { // do something } In the above code, if multiple threads are accessing t, to avoid ConcurrentModificationException, you need to synchronize the entire for loop.

Using CopyOnWriteArrayMap and using the values() method will give you a snapshot of the values thus avoid synchronizing the map for the entire duration of the for loop.

This is achieved by maintaining an internal copy of the values in an array and copying that on modification. So an in any CopyOnWrite class this is only effective on small datasets with lots of reads and few writes.


Inner Class :public interface TypedArrayFactory
Inner Class :public static class ReadOnlyEntrySet extends ReadOnlySet
Inner Class :public static class ReadOnlySet extends AbstractSet
Inner Class :public static class ReadOnlyEntrySetIterator extends ReadOnlyIterator
Inner Class :public static class ReadOnlyIterator implements Iterator
Inner Class :public static class ReadOnlyEntry implements Map.Entry


Constructor Summary
public  CopyOnWriteArrayMap()
    
public  CopyOnWriteArrayMap(int initialCapacity, float loadFactor)
    
public  CopyOnWriteArrayMap(int initialCapacity)
    
public  CopyOnWriteArrayMap(TypedArrayFactory factory)
    
public  CopyOnWriteArrayMap(int initialCapacity, float loadFactor, TypedArrayFactory factory)
    
public  CopyOnWriteArrayMap(int initialCapacity, TypedArrayFactory factory)
    

Method Summary
public synchronized  voidclear()
    
public  SetentrySet()
     This returns a Read only set since remove is not implemented on the set due to lack to time.
public  SetkeySet()
     This returns a Read only set since remove is not implemented on the set due to lack to time.
public synchronized  Objectput(Object key, Object value)
    
public synchronized  voidputAll(Map t)
    
public synchronized  Objectremove(Object key)
    
public synchronized  Collectionvalues()
    
public synchronized  Object[]valuesToArray()
    


Constructor Detail
CopyOnWriteArrayMap
public CopyOnWriteArrayMap()(Code)



CopyOnWriteArrayMap
public CopyOnWriteArrayMap(int initialCapacity, float loadFactor)(Code)



CopyOnWriteArrayMap
public CopyOnWriteArrayMap(int initialCapacity)(Code)



CopyOnWriteArrayMap
public CopyOnWriteArrayMap(TypedArrayFactory factory)(Code)



CopyOnWriteArrayMap
public CopyOnWriteArrayMap(int initialCapacity, float loadFactor, TypedArrayFactory factory)(Code)



CopyOnWriteArrayMap
public CopyOnWriteArrayMap(int initialCapacity, TypedArrayFactory factory)(Code)




Method Detail
clear
public synchronized void clear()(Code)



entrySet
public Set entrySet()(Code)
This returns a Read only set since remove is not implemented on the set due to lack to time.



keySet
public Set keySet()(Code)
This returns a Read only set since remove is not implemented on the set due to lack to time.



put
public synchronized Object put(Object key, Object value)(Code)



putAll
public synchronized void putAll(Map t)(Code)



remove
public synchronized Object remove(Object key)(Code)



values
public synchronized Collection values()(Code)



valuesToArray
public synchronized Object[] valuesToArray()(Code)



Methods inherited from java.util.Hashtable
public synchronized void clear()(Code)(Java Doc)
public synchronized Object clone()(Code)(Java Doc)
public synchronized boolean contains(Object value)(Code)(Java Doc)
public synchronized boolean containsKey(Object key)(Code)(Java Doc)
public boolean containsValue(Object value)(Code)(Java Doc)
public synchronized Enumeration<V> elements()(Code)(Java Doc)
public Set<Map.Entry<K, V>> entrySet()(Code)(Java Doc)
public synchronized boolean equals(Object o)(Code)(Java Doc)
public synchronized V get(Object key)(Code)(Java Doc)
public synchronized int hashCode()(Code)(Java Doc)
public synchronized boolean isEmpty()(Code)(Java Doc)
public Set<K> keySet()(Code)(Java Doc)
public synchronized Enumeration<K> keys()(Code)(Java Doc)
public synchronized V put(K key, V value)(Code)(Java Doc)
public synchronized void putAll(Map<? extends K, ? extends V> t)(Code)(Java Doc)
protected void rehash()(Code)(Java Doc)
public synchronized V remove(Object key)(Code)(Java Doc)
public synchronized int size()(Code)(Java Doc)
public synchronized String toString()(Code)(Java Doc)
public Collection<V> values()(Code)(Java Doc)

www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.