3.3 - Thread Logging

src/main/java/apoc/ApocKernelExtensionFactory.java

@@ -71,6 +71,7 @@ public IndexUpdateTransactionEventHandler.LifeCycle getIndexUpdateLifeCycle() {
         public void start() throws Throwable {
             ApocConfiguration.initialize(db);
             Pools.NEO4J_SCHEDULER = dependencies.scheduler();
+            ThreadPoolExecutorLogger.LOG = log.getUserLog( ThreadPoolExecutorLogger.class );
             registerCustomProcedures();
             ttlLifeCycle = new TTLLifeCycle(Pools.NEO4J_SCHEDULER, db, log.getUserLog(TTLLifeCycle.class));
             ttlLifeCycle.start();

src/main/java/apoc/Pools.java

@@ -16,6 +16,7 @@ public class Pools {
     static final String CONFIG_JOBS_SCHEDULED_NUM_THREADS = "jobs.scheduled.num_threads";
     static final String CONFIG_JOBS_POOL_NUM_THREADS = "jobs.pool.num_threads";
     static final String CONFIG_BROKERS_NUM_THREADS = "brokers.num_threads";
+    static final String CONFIG_DEBUG_LOG_THREADS = "jobs.debug.logs";
 
     public final static int DEFAULT_SCHEDULED_THREADS = Runtime.getRuntime().availableProcessors() / 4;
     public final static int DEFAULT_POOL_THREADS = Runtime.getRuntime().availableProcessors() * 2;
@@ -46,9 +47,8 @@ private Pools() {
     public static ExecutorService createDefaultPool() {
         int threads = getNoThreadsInDefaultPool();
         int queueSize = threads * 25;
-        return new ThreadPoolExecutor(threads / 2, threads, 30L, TimeUnit.SECONDS, new ArrayBlockingQueue<>(queueSize),
-                new CallerBlocksPolicy());
-//                new ThreadPoolExecutor.CallerRunsPolicy());
+        return new ThreadPoolExecutorLogger(threads / 2, threads, 30L, TimeUnit.SECONDS, new ArrayBlockingQueue<>(queueSize),
+                new CallerBlocksPolicy(), "DEFAULT", threadPoolDebug());
     }
     static class CallerBlocksPolicy implements RejectedExecutionHandler {
         @Override
@@ -80,7 +80,9 @@ public static int getNoThreadsInBrokerPool() {
     }
 
     private static ExecutorService createSinglePool() {
-        return Executors.newSingleThreadExecutor();
+        return new ThreadPoolExecutorLogger(1, 1,
+                        0L, TimeUnit.MILLISECONDS,
+                        new LinkedBlockingQueue<Runnable>(), "SINGLE", threadPoolDebug() );
     }
 
     private static ScheduledExecutorService createScheduledPool() {
@@ -90,8 +92,8 @@ private static ScheduledExecutorService createScheduledPool() {
     private static ExecutorService createBrokerPool() {
         int threads = getNoThreadsInBrokerPool();
         int queueSize = threads * 25;
-        return new ThreadPoolExecutor(threads / 2, threads, 30L, TimeUnit.SECONDS, new ArrayBlockingQueue<>(queueSize),
-                new CallerBlocksPolicy());
+        return new ThreadPoolExecutorLogger(threads / 2, threads, 30L, TimeUnit.SECONDS, new ArrayBlockingQueue<>(queueSize),
+                new CallerBlocksPolicy(), "BROKER", threadPoolDebug() );
     }
 
     public static <T> Future<Void> processBatch(List<T> batch, GraphDatabaseService db, Consumer<T> action) {
@@ -114,4 +116,9 @@ public static <T> T force(Future<T> future) throws ExecutionException {
             }
         }
     }
+
+    public static Boolean threadPoolDebug()
+    {
+        return Boolean.valueOf( ApocConfiguration.get( CONFIG_DEBUG_LOG_THREADS, "false" ) );
+    }
 }

src/main/java/apoc/ThreadPoolExecutorLogger.java

@@ -0,0 +1,74 @@
+package apoc;
+
+import org.neo4j.logging.Log;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.RejectedExecutionHandler;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+
+public class ThreadPoolExecutorLogger extends ThreadPoolExecutor
+{
+    public static Log LOG;
+    private Boolean debugLog;
+    private String poolName;
+
+    public ThreadPoolExecutorLogger( int corePoolSize, int maximumPoolSize, long keepAliveTime, TimeUnit unit, BlockingQueue<Runnable> workQueue,
+            String poolName, Boolean threadPoolDebug )
+    {
+        super( corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue );
+        this.poolName = poolName;
+        this.debugLog = threadPoolDebug;
+    }
+
+    public ThreadPoolExecutorLogger( int corePoolSize, int maximumPoolSize, long keepAliveTime, TimeUnit unit, BlockingQueue<Runnable> workQueue,
+            RejectedExecutionHandler handler, String poolName, Boolean threadPoolDebug )
+    {
+        super( corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue, handler );
+        this.poolName = poolName;
+        this.debugLog = threadPoolDebug;
+    }
+
+    @Override
+    protected void beforeExecute( Thread t, Runnable r )
+    {
+        if ( LOG != null && debugLog )
+        {
+            LOG.debug( "BeforeExecute Logging:\n" +
+                    "Pool: " + this.poolName + "\n" +
+                    "Active Thread Count: " + this.getActiveCount() + "\n" +
+                    "Thread Name: " + t.getName() + "\n" +
+                    "Thread Id: " + t.getId() + "\n" +
+                    "Thread Priority: " + t.getPriority() + "\n"
+            );
+        }
+        super.beforeExecute( t, r );
+    }
+
+    public Log getLog()
+    {
+        return LOG;
+    }
+
+    public void setLog( Log log )
+    {
+        this.LOG = log;
+    }
+
+    public Map<String,Object> getInfo()
+    {
+        Map<String,Object> loggingResult = new HashMap<>(  );
+        loggingResult.put( "poolName", poolName );
+        loggingResult.put( "activeCount", this.getActiveCount() );
+        loggingResult.put( "corePoolSize", this.getCorePoolSize() );
+        loggingResult.put( "poolSize", this.getPoolSize() );
+        loggingResult.put( "largestPoolSize", this.getLargestPoolSize() );
+        loggingResult.put( "maximumPoolSize", this.getMaximumPoolSize() );
+        loggingResult.put( "taskCount", this.getTaskCount() );
+        loggingResult.put( "completedTaskCount", this.getCompletedTaskCount() );
+
+        return loggingResult;
+    }
+}

src/main/java/apoc/log/Logging.java

@@ -1,11 +1,16 @@
 package apoc.log;
 
+import apoc.Pools;
+import apoc.ThreadPoolExecutorLogger;
+import apoc.result.MapResult;
 import org.neo4j.logging.Log;
 import org.neo4j.procedure.Context;
 import org.neo4j.procedure.Description;
 import org.neo4j.procedure.Name;
 import org.neo4j.procedure.Procedure;
+
 import java.util.Map;
+import java.util.stream.Stream;
 
 /**
  * @author bradnussbaum
@@ -49,4 +54,14 @@ public void debug( @Name( "message" ) String message,
         log.debug( message, params );
     }
 
+    @Procedure
+    @Description( "apoc.log.threadPools() - logs threading info." )
+    public Stream<MapResult> threadPools()
+    {
+        Map<String,Object> singleInfo = ((ThreadPoolExecutorLogger) Pools.SINGLE).getInfo();
+        Map<String,Object> defaultInfo = ((ThreadPoolExecutorLogger) Pools.DEFAULT).getInfo();
+        Map<String,Object> brokerInfo = ((ThreadPoolExecutorLogger) Pools.BROKER).getInfo();
+
+        return Stream.of( new MapResult( singleInfo ), new MapResult( defaultInfo ), new MapResult( brokerInfo ) );
+    }
 }