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Diffstat (limited to 'plugins/org.eclipse.net4j.util/src/org/eclipse/net4j/util/cache/CacheMonitor.java')
-rw-r--r--plugins/org.eclipse.net4j.util/src/org/eclipse/net4j/util/cache/CacheMonitor.java502
1 files changed, 251 insertions, 251 deletions
diff --git a/plugins/org.eclipse.net4j.util/src/org/eclipse/net4j/util/cache/CacheMonitor.java b/plugins/org.eclipse.net4j.util/src/org/eclipse/net4j/util/cache/CacheMonitor.java
index f4dc24ce36..b5ff052923 100644
--- a/plugins/org.eclipse.net4j.util/src/org/eclipse/net4j/util/cache/CacheMonitor.java
+++ b/plugins/org.eclipse.net4j.util/src/org/eclipse/net4j/util/cache/CacheMonitor.java
@@ -1,251 +1,251 @@
-/*
- * Copyright (c) 2004 - 2012 Eike Stepper (Berlin, Germany) and others.
- * 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:
- * Eike Stepper - initial API and implementation
- */
-package org.eclipse.net4j.util.cache;
-
-import org.eclipse.net4j.internal.util.bundle.OM;
-import org.eclipse.net4j.util.ImplementationError;
-import org.eclipse.net4j.util.concurrent.Worker;
-import org.eclipse.net4j.util.event.Event;
-import org.eclipse.net4j.util.event.IListener;
-import org.eclipse.net4j.util.om.trace.ContextTracer;
-
-import java.util.HashMap;
-import java.util.Map;
-
-/**
- * @author Eike Stepper
- */
-public class CacheMonitor extends Worker implements ICacheMonitor
-{
- // percentFreeAllocated = Round((freeMemory / totalMemory) * 100);
- // percentAllocated = Round((totalMemory / maxMemory ) * 100);
-
- private static final ContextTracer TRACER = new ContextTracer(OM.DEBUG, CacheMonitor.class);
-
- private static final long DEFAULT_PAUSE_GREEN = 60L * 1000L; // 1 minute
-
- private static final long DEFAULT_PAUSE_YELLOW = 5L * 1000L; // 5 seconds
-
- private static final long DEFAULT_PAUSE_RED = 100L; // 100 milliseconds
-
- private long pauseGREEN = DEFAULT_PAUSE_GREEN;
-
- private long pauseYELLOW = DEFAULT_PAUSE_YELLOW;
-
- private long pauseRED = DEFAULT_PAUSE_RED;
-
- private ConditionPolicy conditionPolicy;
-
- private Condition condition;
-
- private Map<ICache, ICacheRegistration> registrations = new HashMap<ICache, ICacheRegistration>();
-
- public CacheMonitor()
- {
- }
-
- public long getPauseGREEN()
- {
- return pauseGREEN;
- }
-
- public void setPauseGREEN(long pauseGREEN)
- {
- this.pauseGREEN = pauseGREEN;
- }
-
- public long getPauseYELLOW()
- {
- return pauseYELLOW;
- }
-
- public void setPauseYELLOW(long pauseYELLOW)
- {
- this.pauseYELLOW = pauseYELLOW;
- }
-
- public long getPauseRED()
- {
- return pauseRED;
- }
-
- public void setPauseRED(long pauseRED)
- {
- this.pauseRED = pauseRED;
- }
-
- public ConditionPolicy getConditionPolicy()
- {
- return conditionPolicy;
- }
-
- public void setConditionPolicy(ConditionPolicy conditionPolicy)
- {
- this.conditionPolicy = conditionPolicy;
- }
-
- public Condition getCondition()
- {
- return condition;
- }
-
- public ICacheRegistration[] getRegistrations()
- {
- synchronized (registrations)
- {
- return registrations.values().toArray(new ICacheRegistration[registrations.size()]);
- }
- }
-
- public ICacheRegistration registerCache(ICache cache)
- {
- if (TRACER.isEnabled())
- {
- TRACER.trace("Registering cache " + cache); //$NON-NLS-1$
- }
-
- ICacheRegistration registration = new CacheRegistration(this, cache);
- ICacheRegistration oldRegistration;
- synchronized (registrations)
- {
- oldRegistration = registrations.put(cache, registration);
- }
-
- if (oldRegistration != null)
- {
- oldRegistration.dispose();
- }
-
- return registration;
- }
-
- public void deregisterCache(ICache cache)
- {
- ICacheRegistration registration;
- synchronized (registrations)
- {
- registration = registrations.remove(cache);
- }
-
- if (registration != null)
- {
- registration.dispose();
- if (TRACER.isEnabled())
- {
- TRACER.trace("Deregistered cache " + cache); //$NON-NLS-1$
- }
- }
- }
-
- @Override
- protected void doBeforeActivate() throws Exception
- {
- super.doBeforeActivate();
- if (conditionPolicy == null)
- {
- throw new IllegalStateException("conditionPolicy == null"); //$NON-NLS-1$
- }
- }
-
- @Override
- protected void doDeactivate() throws Exception
- {
- for (ICacheRegistration registration : getRegistrations())
- {
- registration.dispose();
- }
-
- registrations.clear();
- super.doDeactivate();
- }
-
- @Override
- protected void work(WorkContext context) throws Exception
- {
- Condition newCondition = conditionPolicy.getNewCondition(condition);
- setCondition(newCondition);
-
- switch (newCondition)
- {
- case GREEN:
- context.nextWork(pauseGREEN);
- break;
-
- case YELLOW:
- context.nextWork(pauseYELLOW);
- break;
-
- case RED:
- handleConditionRED();
- context.nextWork(pauseRED);
- break;
- }
- }
-
- protected void setCondition(Condition newCondition)
- {
- if (newCondition == null)
- {
- throw new ImplementationError("newCondition == null"); //$NON-NLS-1$
- }
-
- Condition oldCondition = condition;
- if (newCondition != oldCondition)
- {
- condition = newCondition;
- IListener[] listeners = getListeners();
- if (listeners != null)
- {
- fireEvent(new CacheMonitorEvent(oldCondition, newCondition), listeners);
- }
- }
- }
-
- protected void handleConditionRED()
- {
- OM.LOG.warn("CONDITION RED"); //$NON-NLS-1$
- }
-
- /**
- * @author Eike Stepper
- */
- private final class CacheMonitorEvent extends Event implements ICacheMonitorEvent
- {
- private static final long serialVersionUID = 1L;
-
- private Condition oldCondition;
-
- private Condition newCondition;
-
- public CacheMonitorEvent(Condition oldCondition, Condition newCondition)
- {
- super(CacheMonitor.this);
- this.oldCondition = oldCondition;
- this.newCondition = newCondition;
- }
-
- @Override
- public ICacheMonitor getSource()
- {
- return (ICacheMonitor)super.getSource();
- }
-
- public Condition getOldCondition()
- {
- return oldCondition;
- }
-
- public Condition getNewCondition()
- {
- return newCondition;
- }
- }
-}
+/*
+ * Copyright (c) 2004 - 2012 Eike Stepper (Berlin, Germany) and others.
+ * 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:
+ * Eike Stepper - initial API and implementation
+ */
+package org.eclipse.net4j.util.cache;
+
+import org.eclipse.net4j.internal.util.bundle.OM;
+import org.eclipse.net4j.util.ImplementationError;
+import org.eclipse.net4j.util.concurrent.Worker;
+import org.eclipse.net4j.util.event.Event;
+import org.eclipse.net4j.util.event.IListener;
+import org.eclipse.net4j.util.om.trace.ContextTracer;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * @author Eike Stepper
+ */
+public class CacheMonitor extends Worker implements ICacheMonitor
+{
+ // percentFreeAllocated = Round((freeMemory / totalMemory) * 100);
+ // percentAllocated = Round((totalMemory / maxMemory ) * 100);
+
+ private static final ContextTracer TRACER = new ContextTracer(OM.DEBUG, CacheMonitor.class);
+
+ private static final long DEFAULT_PAUSE_GREEN = 60L * 1000L; // 1 minute
+
+ private static final long DEFAULT_PAUSE_YELLOW = 5L * 1000L; // 5 seconds
+
+ private static final long DEFAULT_PAUSE_RED = 100L; // 100 milliseconds
+
+ private long pauseGREEN = DEFAULT_PAUSE_GREEN;
+
+ private long pauseYELLOW = DEFAULT_PAUSE_YELLOW;
+
+ private long pauseRED = DEFAULT_PAUSE_RED;
+
+ private ConditionPolicy conditionPolicy;
+
+ private Condition condition;
+
+ private Map<ICache, ICacheRegistration> registrations = new HashMap<ICache, ICacheRegistration>();
+
+ public CacheMonitor()
+ {
+ }
+
+ public long getPauseGREEN()
+ {
+ return pauseGREEN;
+ }
+
+ public void setPauseGREEN(long pauseGREEN)
+ {
+ this.pauseGREEN = pauseGREEN;
+ }
+
+ public long getPauseYELLOW()
+ {
+ return pauseYELLOW;
+ }
+
+ public void setPauseYELLOW(long pauseYELLOW)
+ {
+ this.pauseYELLOW = pauseYELLOW;
+ }
+
+ public long getPauseRED()
+ {
+ return pauseRED;
+ }
+
+ public void setPauseRED(long pauseRED)
+ {
+ this.pauseRED = pauseRED;
+ }
+
+ public ConditionPolicy getConditionPolicy()
+ {
+ return conditionPolicy;
+ }
+
+ public void setConditionPolicy(ConditionPolicy conditionPolicy)
+ {
+ this.conditionPolicy = conditionPolicy;
+ }
+
+ public Condition getCondition()
+ {
+ return condition;
+ }
+
+ public ICacheRegistration[] getRegistrations()
+ {
+ synchronized (registrations)
+ {
+ return registrations.values().toArray(new ICacheRegistration[registrations.size()]);
+ }
+ }
+
+ public ICacheRegistration registerCache(ICache cache)
+ {
+ if (TRACER.isEnabled())
+ {
+ TRACER.trace("Registering cache " + cache); //$NON-NLS-1$
+ }
+
+ ICacheRegistration registration = new CacheRegistration(this, cache);
+ ICacheRegistration oldRegistration;
+ synchronized (registrations)
+ {
+ oldRegistration = registrations.put(cache, registration);
+ }
+
+ if (oldRegistration != null)
+ {
+ oldRegistration.dispose();
+ }
+
+ return registration;
+ }
+
+ public void deregisterCache(ICache cache)
+ {
+ ICacheRegistration registration;
+ synchronized (registrations)
+ {
+ registration = registrations.remove(cache);
+ }
+
+ if (registration != null)
+ {
+ registration.dispose();
+ if (TRACER.isEnabled())
+ {
+ TRACER.trace("Deregistered cache " + cache); //$NON-NLS-1$
+ }
+ }
+ }
+
+ @Override
+ protected void doBeforeActivate() throws Exception
+ {
+ super.doBeforeActivate();
+ if (conditionPolicy == null)
+ {
+ throw new IllegalStateException("conditionPolicy == null"); //$NON-NLS-1$
+ }
+ }
+
+ @Override
+ protected void doDeactivate() throws Exception
+ {
+ for (ICacheRegistration registration : getRegistrations())
+ {
+ registration.dispose();
+ }
+
+ registrations.clear();
+ super.doDeactivate();
+ }
+
+ @Override
+ protected void work(WorkContext context) throws Exception
+ {
+ Condition newCondition = conditionPolicy.getNewCondition(condition);
+ setCondition(newCondition);
+
+ switch (newCondition)
+ {
+ case GREEN:
+ context.nextWork(pauseGREEN);
+ break;
+
+ case YELLOW:
+ context.nextWork(pauseYELLOW);
+ break;
+
+ case RED:
+ handleConditionRED();
+ context.nextWork(pauseRED);
+ break;
+ }
+ }
+
+ protected void setCondition(Condition newCondition)
+ {
+ if (newCondition == null)
+ {
+ throw new ImplementationError("newCondition == null"); //$NON-NLS-1$
+ }
+
+ Condition oldCondition = condition;
+ if (newCondition != oldCondition)
+ {
+ condition = newCondition;
+ IListener[] listeners = getListeners();
+ if (listeners != null)
+ {
+ fireEvent(new CacheMonitorEvent(oldCondition, newCondition), listeners);
+ }
+ }
+ }
+
+ protected void handleConditionRED()
+ {
+ OM.LOG.warn("CONDITION RED"); //$NON-NLS-1$
+ }
+
+ /**
+ * @author Eike Stepper
+ */
+ private final class CacheMonitorEvent extends Event implements ICacheMonitorEvent
+ {
+ private static final long serialVersionUID = 1L;
+
+ private Condition oldCondition;
+
+ private Condition newCondition;
+
+ public CacheMonitorEvent(Condition oldCondition, Condition newCondition)
+ {
+ super(CacheMonitor.this);
+ this.oldCondition = oldCondition;
+ this.newCondition = newCondition;
+ }
+
+ @Override
+ public ICacheMonitor getSource()
+ {
+ return (ICacheMonitor)super.getSource();
+ }
+
+ public Condition getOldCondition()
+ {
+ return oldCondition;
+ }
+
+ public Condition getNewCondition()
+ {
+ return newCondition;
+ }
+ }
+}

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