costin 2003/01/10 22:53:43
Added: util/java/org/apache/tomcat/util/threads
ThreadWithAttributes.java
Log:
Moved ThreadWithAttribute out of ThreadPool.
All attribute operations are guarded by ThreadPool - if an application
has a reference to ThreadPool, it can get/set attributes.
The cost is one cast and a method access.
Revision Changes Path
1.1
jakarta-tomcat-connectors/util/java/org/apache/tomcat/util/threads/ThreadWithAttributes.java
Index: ThreadWithAttributes.java
===================================================================
package org.apache.tomcat.util.threads;
import java.util.Hashtable;
/** Special thread that allows storing of attributes and notes.
* A guard is used to prevent untrusted code from accessing the
* attributes.
*
* This avoids hash lookups and provide something very similar
* with ThreadLocal ( but compatible with JDK1.1 and faster on
* JDK < 1.4 ).
*
* The main use is to store 'state' for monitoring ( like "processing
* request 'GET /' ").
*/
public class ThreadWithAttributes extends Thread {
private Object control;
public static int MAX_NOTES=16;
private Object notes[]=new Object[MAX_NOTES];
private Hashtable attributes=new Hashtable();
private String currentStage;
private Object param;
public ThreadWithAttributes(Object control, Runnable r) {
super(r);
this.control=control;
}
/** Notes - for attributes that need fast access ( array )
* The application is responsible for id management
*/
public final void setNote( Object control, int id, Object value ) {
if( this.control != control ) return;
notes[id]=value;
}
/** Information about the curent performed operation
*/
public final String getCurrentStage(Object control) {
if( this.control != control ) return null;
return currentStage;
}
/** Information about the current request ( or the main object
* we are processing )
*/
public final Object getParam(Object control) {
if( this.control != control ) return null;
return param;
}
public final void setCurrentStage(Object control, String currentStage) {
if( this.control != control ) return;
this.currentStage = currentStage;
}
public final void setParam( Object control, Object param ) {
if( this.control != control ) return;
this.param=param;
}
public final Object getNote(Object control, int id ) {
if( this.control != control ) return null;
return notes[id];
}
/** Generic attributes. You'll need a hashtable lookup -
* you can use notes for array access.
*/
public final Hashtable getAttributes(Object control) {
return attributes;
}
}
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