harish2704/node-job-manager
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feature:

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real pause and resume functions instead of dummy pause and resume

pause jobmanager if tasks are finished and loading is taking place and resume it after loading
This commit is contained in:
harish2704
2014-09-30 07:28:39 +05:30
parent acccb703fd
commit 7cd162fe50
1 changed files with 25 additions and 15 deletions
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src/JobManager.js
+25 -15
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@@ -2,7 +2,7 @@
var utils = require('./utils'); var utils = require('./utils');
var STATE = utils.createEnum([ 'RUNNING' , 'NOT_RUNNING']); var STATE = utils.createEnum([ 'RUNNING', 'PAUSED', 'NOT_RUNNING']);
function JobManager(opts){ function JobManager(opts){
@@ -75,33 +75,37 @@ JobManager.prototype.getFromPool = function(){
JobManager.prototype.$doWork_ = function( cb ){ JobManager.prototype.$doWork_ = function( cb ){
var self = this; var self = this;
var task = self.tasks.splice(0, 1)[0]; var task = this.tasks.splice(0, 1)[0];
if(self.tasks.length/self.concurrency < self.notifyAt && (!self.isLoadingTakingPlace) ){
if( self.onLoadMore && !self.endReached ) {
self.$onLoadMore();
}
}
if( task == undefined ){ if( task == undefined ){
this.stop(); if(this.isLoadingTakingPlace){
this.pause();
} else {
this.stop();
}
return; return;
} }
var worker = self.getFromPool(); var worker = this.getFromPool();
this.work( task, worker, function(err){ this.work( task, worker, function(err){
if(err && self.onError ){ if(err && self.onError ){
self.onError(err, task, worker ); self.onError(err, task, worker );
} }
if(self.tasks.length/self.concurrency < self.notifyAt && (!self.isLoadingTakingPlace) ){
if( self.onLoadMore && !self.endReached ) {
self.$onLoadMore();
}
}
cb();
if( self.state == STATE.NOT_RUNNING ){
if( ( self.runningTasks == 1 ) && self.onStopped ) { self.onStopped(); }
}
self.returnToPool( worker ); self.returnToPool( worker );
if( self.state === STATE.NOT_RUNNING ){
if( ( self.runningTasks === 0 ) && self.onStopped ) { self.onStopped(); }
}
return cb();
}); });
}; };
JobManager.prototype.$trigger = function (){ JobManager.prototype.$trigger = function (){
var self = this; var self = this;
while( this.runningTasks < this.concurrency && this.state == STATE.RUNNING ){ while( this.runningTasks < this.concurrency && this.state === STATE.RUNNING ){
this.$doWork_( function(){ this.$doWork_( function(){
self.$trigger(); self.$trigger();
}); });
@@ -126,16 +130,22 @@ JobManager.prototype.$onLoadMore = function( cb ){
self.isLoadingTakingPlace = true; self.isLoadingTakingPlace = true;
self.onLoadMore(function(){ self.onLoadMore(function(){
self.isLoadingTakingPlace = false; self.isLoadingTakingPlace = false;
if(self.state === STATE.PAUSED ){
self.resume();
}
return cb(); return cb();
}); });
}; };
JobManager.prototype.pause = function(){ JobManager.prototype.pause = function(){
this.state = STATE.NOT_RUNNING; this.state = STATE.PAUSED;
}; };
JobManager.prototype.stop = function(){ JobManager.prototype.stop = function(){
this.state = STATE.NOT_RUNNING; this.state = STATE.NOT_RUNNING;
if( ( this.tasks.length === 0 ) && ( this.runningTasks === 0 ) && ( !this.isLoadingTakingPlace ) ){
this.onStopped();
}
}; };