Bug 1484 - StatisticManager performance improvement refactoring

[controller.git] / opendaylight / md-sal / statistics-manager / src / main / java / org / opendaylight / controller / md / statistics / manager / StatisticsRequestScheduler.java

diff --git a/opendaylight/md-sal/statistics-manager/src/main/java/org/opendaylight/controller/md/statistics/manager/StatisticsRequestScheduler.java b/opendaylight/md-sal/statistics-manager/src/main/java/org/opendaylight/controller/md/statistics/manager/StatisticsRequestScheduler.java
deleted file mode 100644 (file)
index 29a27e2..0000000
--- a/opendaylight/md-sal/statistics-manager/src/main/java/org/opendaylight/controller/md/statistics/manager/StatisticsRequestScheduler.java
+++ /dev/null
@@ -1,140 +0,0 @@
-/*
- * Copyright IBM Corporation, 2013.  All rights reserved.
- *
- * This program and the accompanying materials are made available under the
- * terms of the Eclipse Public License v1.0 which accompanies this distribution,
- * and is available at http://www.eclipse.org/legal/epl-v10.html
- */
-package org.opendaylight.controller.md.statistics.manager;
-
-import java.util.Collections;
-import java.util.Iterator;
-import java.util.LinkedHashMap;
-import java.util.Map;
-import java.util.Timer;
-import java.util.TimerTask;
-import java.util.concurrent.TimeUnit;
-
-import org.opendaylight.controller.md.sal.common.api.TransactionStatus;
-import org.opendaylight.controller.sal.binding.api.data.DataModificationTransaction;
-import org.opendaylight.controller.sal.binding.api.data.DataModificationTransaction.DataTransactionListener;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeRef;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-/**
- * Main responsibility of the class is to check the MD-SAL data store read/write
- * transaction accumulation level and send statistics request if number of pending
- * read/write transactions are zero.
- * @author avishnoi@in.ibm.com
- *
- */
-@SuppressWarnings("rawtypes")
-public class StatisticsRequestScheduler implements DataTransactionListener {
-
-    private static final Logger srsLogger = LoggerFactory.getLogger(StatisticsRequestScheduler.class);
-    private final Timer timer = new Timer("request-monitor", true);
-
-    // We need ordered retrieval, and O(1) contains operation
-    private final Map<AbstractStatsTracker,Integer> requestQueue =
-            Collections.synchronizedMap(new LinkedHashMap<AbstractStatsTracker,Integer>());
-
-    private Long PendingTransactions;
-
-    private long lastRequestTime = System.nanoTime();
-
-    private static final long REQUEST_MONITOR_INTERVAL = 1000;
-
-    private final TimerTask task = new TimerTask() {
-        @Override
-        public void run() {
-            try{
-                long now = System.nanoTime();
-                if(now > lastRequestTime+TimeUnit.MILLISECONDS.toNanos(REQUEST_MONITOR_INTERVAL)){
-                    requestStatistics();
-                }
-            }catch (IllegalArgumentException | IllegalStateException | NullPointerException e){
-                srsLogger.warn("Exception occured while sending statistics request : {}",e);
-            }
-        }
-    };
-
-    public StatisticsRequestScheduler(){
-        PendingTransactions = (long) 0;
-    }
-
-    public void addRequestToSchedulerQueue(AbstractStatsTracker statsRequest){
-        requestQueue.put(statsRequest, null);
-    }
-
-    public void removeRequestsFromSchedulerQueue(NodeRef node){
-        AbstractStatsTracker stats = null;
-        synchronized(requestQueue){
-            Iterator<Map.Entry<AbstractStatsTracker, Integer>> nodesItr = requestQueue.entrySet().iterator();
-            while(nodesItr.hasNext()){
-                stats = nodesItr.next().getKey();
-                if(stats.getNodeRef().equals(node)){
-                    nodesItr.remove();
-                }
-            }
-        }
-
-    }
-    public AbstractStatsTracker getNextRequestFromSchedulerQueue(){
-        //Remove first element
-        AbstractStatsTracker stats = null;
-        synchronized(requestQueue){
-            Iterator<Map.Entry<AbstractStatsTracker, Integer>> nodesItr = requestQueue.entrySet().iterator();
-            if(nodesItr.hasNext()){
-                stats = nodesItr.next().getKey();
-                srsLogger.debug("{} chosen up for execution",stats.getNodeRef());
-                nodesItr.remove();
-                return stats;
-            }
-        }
-        return stats;
-    }
-
-    private void requestStatistics(){
-        AbstractStatsTracker stats = this.getNextRequestFromSchedulerQueue();
-        sendStatsRequest(stats);
-    }
-    @Override
-    public void onStatusUpdated(DataModificationTransaction transaction, TransactionStatus status) {
-
-        AbstractStatsTracker stats = null;
-        synchronized(PendingTransactions){
-            switch(status){
-            case SUBMITED:
-                this.PendingTransactions++;
-                break;
-            case COMMITED:
-            case FAILED:
-                this.PendingTransactions--;
-                if(PendingTransactions == 0){
-                    lastRequestTime = System.nanoTime();
-                    stats = this.getNextRequestFromSchedulerQueue();
-                }
-                srsLogger.debug("Pending MD-SAL transactions : {} & Scheduler queue size : {}",this.PendingTransactions,this.requestQueue.size());
-                break;
-            default:
-                break;
-            }
-        }
-        sendStatsRequest(stats);
-    }
-
-    private void sendStatsRequest(AbstractStatsTracker stats){
-        if(stats != null){
-            try{
-                stats.request();
-                stats.increaseRequestCounter();
-            }catch(Exception e){
-                srsLogger.warn("Statistics request was not sent successfully. Reason : {}",e.getMessage());
-            }
-        }
-    }
-    public void start(){
-        timer.schedule(task, 0, REQUEST_MONITOR_INTERVAL);
-    }
-}