-/*******************************************************************************\r
- * Copyright (c) 2012 Association for Decentralized Information Management\r
- * in Industry THTH ry.\r
- * All rights reserved. This program and the accompanying materials\r
- * are made available under the terms of the Eclipse Public License v1.0\r
- * which accompanies this distribution, and is available at\r
- * http://www.eclipse.org/legal/epl-v10.html\r
- *\r
- * Contributors:\r
- * Semantum Oy - initial API and implementation\r
- *******************************************************************************/\r
-package org.simantics.event.writer;\r
-\r
-import java.util.ArrayList;\r
-import java.util.List;\r
-import java.util.concurrent.atomic.AtomicBoolean;\r
-\r
-import org.eclipse.core.runtime.IProgressMonitor;\r
-import org.eclipse.core.runtime.IStatus;\r
-import org.eclipse.core.runtime.Status;\r
-import org.simantics.DatabaseJob;\r
-import org.simantics.Simantics;\r
-import org.simantics.db.ReadGraph;\r
-import org.simantics.db.Resource;\r
-import org.simantics.db.Session;\r
-import org.simantics.db.VirtualGraph;\r
-import org.simantics.db.WriteOnlyGraph;\r
-import org.simantics.db.common.request.UniqueRead;\r
-import org.simantics.db.common.request.WriteOnlyRequest;\r
-import org.simantics.db.exception.CancelTransactionException;\r
-import org.simantics.db.exception.DatabaseException;\r
-import org.simantics.db.request.WriteOnly;\r
-import org.simantics.event.Activator;\r
-import org.simantics.event.util.EventUtils;\r
-import org.simantics.event.util.EventWriteData;\r
-\r
-/**\r
- * A self-scheduling job that queues up {@link EventWriteTask} instances and\r
- * periodically executes the queued up tasks in a single graph {@link WriteOnly}\r
- * request.\r
- * \r
- * <p>\r
- * Intended to be constructed and scheduled by experiment implementations.\r
- * \r
- * <p>\r
- * Must be disposed when no longer used.\r
- * \r
- * @author Tuukka Lehtonen\r
- * \r
- * @see EventWriteTask\r
- * @see EventSourceResolver\r
- */\r
-public class EventWriterJob extends DatabaseJob {\r
-\r
- private final boolean DEBUG = false;\r
-\r
- private static final int WRITE_SCHEDULE_PERIOD = 1000;\r
-\r
- private static final long MIN_QUEUE_QUIET_TIME = 1000L;\r
-\r
- private static final long MIN_WRITE_QUIET_TIME = 1000L;\r
-\r
- private static final int MAX_TASK_QUEUE_SIZE = 500;\r
-\r
- private static final EventWriteTask[] NONE = {};\r
-\r
- private List<EventWriteTask> tasks = new ArrayList<EventWriteTask>();\r
-\r
- private VirtualGraph virtualGraph;\r
- private Resource eventLog;\r
- private EventSourceResolver resolver;\r
-\r
- private AtomicBoolean scheduled = new AtomicBoolean(false);\r
- private AtomicBoolean polling = new AtomicBoolean(true);\r
-\r
- private long lastWriteTime = Long.MIN_VALUE;\r
- private long lastQueueTime = Long.MIN_VALUE;\r
-\r
- public EventWriterJob(VirtualGraph virtualGraph, Resource eventLog, EventSourceResolver resolver) {\r
- super("Event Writer");\r
- setPriority(DECORATE);\r
- setUser(false);\r
- setSystem(false);\r
- this.virtualGraph = virtualGraph;\r
- this.eventLog = eventLog;\r
- this.resolver = resolver;\r
- }\r
-\r
- public void dispose() {\r
- if (DEBUG)\r
- System.out.println(this + ": DISPOSE");\r
- polling.set(false);\r
- }\r
-\r
- public void queue(EventWriteTask task) {\r
- synchronized (tasks) {\r
- tasks.add(task);\r
- this.lastQueueTime = System.currentTimeMillis();\r
-\r
- if (scheduled.compareAndSet(false, true)) {\r
- schedule(WRITE_SCHEDULE_PERIOD);\r
- }\r
- }\r
- }\r
-\r
- @Override\r
- public boolean shouldRun() {\r
- return polling.get() && Simantics.peekSession() != null;\r
- }\r
-\r
- @Override\r
- protected IStatus run(final IProgressMonitor monitor) {\r
- try {\r
- Session session = Simantics.peekSession();\r
- if (session == null)\r
- return Status.CANCEL_STATUS;\r
-\r
- int taskCount = countTasks();\r
- if (taskCount == 0)\r
- return Status.CANCEL_STATUS;\r
-\r
- long currentTime = System.currentTimeMillis();\r
-\r
- // Must flush write at some point if no flush has been performed yet.\r
- if (lastWriteTime == Long.MIN_VALUE)\r
- lastWriteTime = currentTime;\r
-\r
- long queueQuietTime = currentTime - lastQueueTime;\r
- long writeQuietTime = currentTime - lastWriteTime;\r
- boolean queueQuietTimePassed = queueQuietTime >= MIN_QUEUE_QUIET_TIME;\r
- boolean writeQuietTimePassed = writeQuietTime >= MIN_WRITE_QUIET_TIME;\r
- boolean taskCountExceeded = taskCount >= MAX_TASK_QUEUE_SIZE;\r
-\r
- if (DEBUG) {\r
- System.out.println("Queue quiet time: " + queueQuietTime);\r
- System.out.println("Write quiet time: " + writeQuietTime);\r
- System.out.println("Task count: " + taskCount);\r
- }\r
-\r
- if (!writeQuietTimePassed && !queueQuietTimePassed && !taskCountExceeded) {\r
- return Status.CANCEL_STATUS;\r
- }\r
-\r
- if (DEBUG) {\r
- if (queueQuietTimePassed)\r
- System.out.println("Queue quiet time (" + MIN_QUEUE_QUIET_TIME + ") exceeded: " + queueQuietTime);\r
- if (writeQuietTimePassed)\r
- System.out.println("Write quiet time (" + MIN_WRITE_QUIET_TIME + ") exceeded: " + writeQuietTime);\r
- if (taskCountExceeded)\r
- System.out.println("Maximum queued task count (" + MAX_TASK_QUEUE_SIZE + ") exceeded: " + taskCount);\r
- }\r
-\r
- final EventWriteTask[] tasks = pruneTasks();\r
- if (tasks.length == 0)\r
- return Status.CANCEL_STATUS;\r
-\r
- if (DEBUG)\r
- System.out.println(this + ": about to write " + tasks.length + " events");\r
- setThread(Thread.currentThread());\r
-\r
- monitor.beginTask("Flush Events", tasks.length);\r
- \r
- try {\r
- \r
- final EventWriteData writeData = session.syncRequest(new UniqueRead<EventWriteData>() {\r
-\r
- @Override\r
- public EventWriteData perform(ReadGraph graph) throws DatabaseException {\r
- return new EventWriteData(graph, eventLog, virtualGraph);\r
- }\r
- \r
- }); \r
-\r
- session.sync(new WriteOnlyRequest(virtualGraph) {\r
- @Override\r
- public void perform(WriteOnlyGraph graph) throws DatabaseException {\r
- \r
- setThread(Thread.currentThread());\r
- List<Resource> events = new ArrayList<Resource>(tasks.length);\r
- for (EventWriteTask task : tasks) {\r
-\r
- writeData.prepareToWrite(graph);\r
- \r
- Resource event = task.write(graph, writeData.targetSlice, writeData.targetPos);\r
- if (event != null) {\r
- events.add(event);\r
- writeData.written();\r
- }\r
- monitor.worked(1);\r
- \r
- }\r
- \r
- writeData.commit(graph);\r
- \r
- if (resolver != null) {\r
- if (DEBUG)\r
- System.out.println(EventWriterJob.this + ": queue " + events.size() + " for source resolution");\r
- resolver.queueEvents(events);\r
- }\r
- }\r
- });\r
- lastWriteTime = System.currentTimeMillis();\r
- } catch (CancelTransactionException e) {\r
- polling.set(false);\r
- return Status.CANCEL_STATUS;\r
- } catch (DatabaseException e) {\r
- return new Status(IStatus.ERROR, Activator.BUNDLE_ID, "Event writing failed", e);\r
- }\r
-\r
- return Status.OK_STATUS;\r
- } finally {\r
- monitor.done();\r
- schedule(WRITE_SCHEDULE_PERIOD);\r
- }\r
- }\r
-\r
- private int countTasks() {\r
- synchronized (tasks) {\r
- return tasks.size();\r
- }\r
- }\r
-\r
- private EventWriteTask[] pruneTasks() {\r
- synchronized (this.tasks) {\r
- EventWriteTask[] tasks = this.tasks.toArray(NONE);\r
- this.tasks.clear();\r
- return tasks;\r
- }\r
- }\r
-\r
+/*******************************************************************************
+ * Copyright (c) 2012 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * 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
+ *
+ * Contributors:
+ * Semantum Oy - initial API and implementation
+ *******************************************************************************/
+package org.simantics.event.writer;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.core.runtime.IStatus;
+import org.eclipse.core.runtime.Status;
+import org.simantics.DatabaseJob;
+import org.simantics.Simantics;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.Session;
+import org.simantics.db.VirtualGraph;
+import org.simantics.db.WriteOnlyGraph;
+import org.simantics.db.common.request.UniqueRead;
+import org.simantics.db.common.request.WriteOnlyRequest;
+import org.simantics.db.exception.CancelTransactionException;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.request.WriteOnly;
+import org.simantics.event.Activator;
+import org.simantics.event.util.EventUtils;
+import org.simantics.event.util.EventWriteData;
+
+/**
+ * A self-scheduling job that queues up {@link EventWriteTask} instances and
+ * periodically executes the queued up tasks in a single graph {@link WriteOnly}
+ * request.
+ *
+ * <p>
+ * Intended to be constructed and scheduled by experiment implementations.
+ *
+ * <p>
+ * Must be disposed when no longer used.
+ *
+ * @author Tuukka Lehtonen
+ *
+ * @see EventWriteTask
+ * @see EventSourceResolver
+ */
+public class EventWriterJob extends DatabaseJob {
+
+ private final boolean DEBUG = false;
+
+ private static final int WRITE_SCHEDULE_PERIOD = 1000;
+
+ private static final long MIN_QUEUE_QUIET_TIME = 1000L;
+
+ private static final long MIN_WRITE_QUIET_TIME = 1000L;
+
+ private static final int MAX_TASK_QUEUE_SIZE = 500;
+
+ private static final EventWriteTask[] NONE = {};
+
+ private List<EventWriteTask> tasks = new ArrayList<EventWriteTask>();
+
+ private VirtualGraph virtualGraph;
+ private Resource eventLog;
+ private EventSourceResolver resolver;
+
+ private AtomicBoolean scheduled = new AtomicBoolean(false);
+ private AtomicBoolean polling = new AtomicBoolean(true);
+
+ private long lastWriteTime = Long.MIN_VALUE;
+ private long lastQueueTime = Long.MIN_VALUE;
+
+ public EventWriterJob(VirtualGraph virtualGraph, Resource eventLog, EventSourceResolver resolver) {
+ super("Event Writer");
+ setPriority(DECORATE);
+ setUser(false);
+ setSystem(false);
+ this.virtualGraph = virtualGraph;
+ this.eventLog = eventLog;
+ this.resolver = resolver;
+ }
+
+ public void dispose() {
+ if (DEBUG)
+ System.out.println(this + ": DISPOSE");
+ polling.set(false);
+ }
+
+ public void queue(EventWriteTask task) {
+ synchronized (tasks) {
+ tasks.add(task);
+ this.lastQueueTime = System.currentTimeMillis();
+
+ if (scheduled.compareAndSet(false, true)) {
+ schedule(WRITE_SCHEDULE_PERIOD);
+ }
+ }
+ }
+
+ @Override
+ public boolean shouldRun() {
+ return polling.get() && Simantics.peekSession() != null;
+ }
+
+ @Override
+ protected IStatus run(final IProgressMonitor monitor) {
+ try {
+ Session session = Simantics.peekSession();
+ if (session == null)
+ return Status.CANCEL_STATUS;
+
+ int taskCount = countTasks();
+ if (taskCount == 0)
+ return Status.CANCEL_STATUS;
+
+ long currentTime = System.currentTimeMillis();
+
+ // Must flush write at some point if no flush has been performed yet.
+ if (lastWriteTime == Long.MIN_VALUE)
+ lastWriteTime = currentTime;
+
+ long queueQuietTime = currentTime - lastQueueTime;
+ long writeQuietTime = currentTime - lastWriteTime;
+ boolean queueQuietTimePassed = queueQuietTime >= MIN_QUEUE_QUIET_TIME;
+ boolean writeQuietTimePassed = writeQuietTime >= MIN_WRITE_QUIET_TIME;
+ boolean taskCountExceeded = taskCount >= MAX_TASK_QUEUE_SIZE;
+
+ if (DEBUG) {
+ System.out.println("Queue quiet time: " + queueQuietTime);
+ System.out.println("Write quiet time: " + writeQuietTime);
+ System.out.println("Task count: " + taskCount);
+ }
+
+ if (!writeQuietTimePassed && !queueQuietTimePassed && !taskCountExceeded) {
+ return Status.CANCEL_STATUS;
+ }
+
+ if (DEBUG) {
+ if (queueQuietTimePassed)
+ System.out.println("Queue quiet time (" + MIN_QUEUE_QUIET_TIME + ") exceeded: " + queueQuietTime);
+ if (writeQuietTimePassed)
+ System.out.println("Write quiet time (" + MIN_WRITE_QUIET_TIME + ") exceeded: " + writeQuietTime);
+ if (taskCountExceeded)
+ System.out.println("Maximum queued task count (" + MAX_TASK_QUEUE_SIZE + ") exceeded: " + taskCount);
+ }
+
+ final EventWriteTask[] tasks = pruneTasks();
+ if (tasks.length == 0)
+ return Status.CANCEL_STATUS;
+
+ if (DEBUG)
+ System.out.println(this + ": about to write " + tasks.length + " events");
+ setThread(Thread.currentThread());
+
+ monitor.beginTask("Flush Events", tasks.length);
+
+ try {
+
+ final EventWriteData writeData = session.syncRequest(new UniqueRead<EventWriteData>() {
+
+ @Override
+ public EventWriteData perform(ReadGraph graph) throws DatabaseException {
+ return new EventWriteData(graph, eventLog, virtualGraph);
+ }
+
+ });
+
+ session.sync(new WriteOnlyRequest(virtualGraph) {
+ @Override
+ public void perform(WriteOnlyGraph graph) throws DatabaseException {
+
+ setThread(Thread.currentThread());
+ List<Resource> events = new ArrayList<Resource>(tasks.length);
+ for (EventWriteTask task : tasks) {
+
+ writeData.prepareToWrite(graph);
+
+ Resource event = task.write(graph, writeData.targetSlice, writeData.targetPos);
+ if (event != null) {
+ events.add(event);
+ writeData.written();
+ }
+ monitor.worked(1);
+
+ }
+
+ writeData.commit(graph);
+
+ if (resolver != null) {
+ if (DEBUG)
+ System.out.println(EventWriterJob.this + ": queue " + events.size() + " for source resolution");
+ resolver.queueEvents(events);
+ }
+ }
+ });
+ lastWriteTime = System.currentTimeMillis();
+ } catch (CancelTransactionException e) {
+ polling.set(false);
+ return Status.CANCEL_STATUS;
+ } catch (DatabaseException e) {
+ return new Status(IStatus.ERROR, Activator.BUNDLE_ID, "Event writing failed", e);
+ }
+
+ return Status.OK_STATUS;
+ } finally {
+ monitor.done();
+ schedule(WRITE_SCHEDULE_PERIOD);
+ }
+ }
+
+ private int countTasks() {
+ synchronized (tasks) {
+ return tasks.size();
+ }
+ }
+
+ private EventWriteTask[] pruneTasks() {
+ synchronized (this.tasks) {
+ EventWriteTask[] tasks = this.tasks.toArray(NONE);
+ this.tasks.clear();
+ return tasks;
+ }
+ }
+
}
\ No newline at end of file
Code Review / simantics / platform.git / blobdiff