Java producer consumer issues.

Last Update:2018-12-04 Source: Internet

Author: User

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Producer, consumer, fixed-length buffer, and thread can be interrupted externally

Import java. util. arrays;
Import java. util. date;
Import java. util. Collections list;
Import javax. Swing .*;

Public class producerconsumer {

Public static jframe inst;

Public static void main (string [] ARGs ){

Bufferlock buffer = new bufferlock ();
Controlcondition indexcontrol = new controlcondition ();

(New indextimedialogthread (indexcontrol). Start ();
(New producer (buffer, indexcontrol, "extract"). Start ();
(New consumer (buffer, indexcontrol, "Index"). Start ();
}

}

// This class is the warehouse, which is a synchronous resource for the producer and consumer to compete for control.
Class bufferlock {
Public Boolean isproduceend;

Public int bufferlength;

Shortlist <string> List = new shortlist <string> ();

Bufferlock (){
Bufferlength = 10;
}

// Place the production product in the buffer list
Public synchronized void push (string product ){
While (list. Size () = bufferlength) {// warehouse full
Try {
Wait (); // wait
} Catch (interruptedexception e ){
E. printstacktrace ();
}
}
// Warehouse dissatisfaction
Policyall ();
List. Add (product );
System. Out. println ("extracted:" + product );
System. Out. println (arrays. tostring (list. toarray ()));
}

// Consume the product and remove it from the buffer list
Public synchronized void POP (){
While (list. Size () = 0) {// The repository is empty.
Try {
System. Out. println ("no index resource, waiting for extraction ");
Wait ();
} Catch (interruptedexception e ){
E. printstacktrace ();
}
}
Policyall ();
String Product = List. removefirst ();
System. Out. println ("indexed:" + product );
System. Out. println (arrays. tostring (list. toarray ()));
}
}

Class producer extends thread {
Bufferlock buffer = NULL;

String name;

Controlcondition indexcontrol;

Producer (bufferlock buffer, controlcondition indexcontrol, string name ){
This. Buffer = buffer;
This. indexcontrol = indexcontrol;
This. Name = Name;
}

Public void run (){

For (INT I = 0; I <200; I ++ ){
If (indexcontrol. isinterrupt = false) {// No external interruption
Buffer. Push ("file" + I );
If (I = 199) {// extraction ends
System. Out. println ("extraction ended ");
Indexcontrol. isextractend = true;
}
} Else {
System. Out. println ("extraction interrupt ");
Break;
}
}
}
}

Class consumer extends thread {
Bufferlock buffer = NULL;

Controlcondition indexcontrol;

String name;

Consumer (bufferlock buffer, controlcondition indexcontrol, string name ){
This. indexcontrol = indexcontrol;
This. Buffer = buffer;
This. Name = Name;
}

Public void run (){
While (true ){
If (indexcontrol. isinterrupt = false) {// No external interruption
If (indexcontrol. isextractend = true & buffer. List. Size () = 0)
{// The scan is complete and the buffer is null, which is the index end condition.
System. Out. println ("index ended ");
Indexcontrol. isindexend = true;
Break;
} Else
Buffer. Pop ();
} Else {
System. Out. println ("index interrupted ");
Break;
}
}
}
}

Class controlcondition {
Boolean isextractend = false;

Boolean isindexend = false;

Boolean isinterrupt = false;
}

/*
* Display the index consumption time dialog box thread
*/
Class indextimedialogthread extends thread {
Showdialog DLG;

Controlcondition indexcontrol;

Public indextimedialogthread (controlcondition indexcontrol ){
This. indexcontrol = indexcontrol;
DLG = new showdialog (null, indexcontrol, "Create Index", false ,"");
DLG. jbutok. setenabled (false );
DLG. setvisible (true );
}

Public void run (){
Date starttime = new date ();
While (true ){
Date Now = new date ();
DLG. jlabelshow. settext ("<HTML> <body> creating index... timing: "
+ (Now. gettime ()-starttime. gettime ())
+ " millisecond </body> If (indexcontrol. isindexend = true) {// indexthread complete
Date endtime = new date ();
DLG. jlabelshow. settext ("<HTML> <body> index completed! Total time consumption "
+ (Endtime. gettime ()-starttime. gettime ())
+ " millisecond." + " View index logs in the index menu"
+ "</Body> DLG. jbutok. setenabled (true );
DLG. jbutstopindexthread. setenabled (false );
Break;
}

If (indexcontrol. isinterrupt = true) {// indexthread interrupt
Date endtime = new date ();
DLG. jlabelshow. settext ("<HTML> <body> index interrupted! Total time consumption "
+ (Endtime. gettime ()-starttime. gettime ())
+ " millisecond." + " View index logs in the index menu"
+ "</Body> DLG. jbutok. setenabled (true );
DLG. jbutstopindexthread. setenabled (false );
Break;
}
}
}
}

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