Examples of Heartbeat

com.dianping.cat.message.Heartbeat

Heartbeat is used to log data that happens in a regular intervals, for example once per second, such as system load, CPU percentage, memory usage, thread pool statistics, cache hit/miss rate, service manifest etc., and even some configuration could be carried by Heartbeat. There could be some good use cases, for example health checker and load balancer, that make good use of it.

Heartbeat should never be used per request since the request is not regular predictable, instead it could be logged in a daemon background thread, or something like a Timer.

All CAT message will be constructed as a message tree and send to back-end for further analysis, and for monitoring. Only Transaction can be a tree node, all other message will be the tree leaf.　The transaction without other messages nested is an atomic transaction.
@author Frankie Wu
com.opengamma.livedata.msg.Heartbeat
com.sirenian.hellbound.domain.glyph.Heartbeat
com.subhajit.processmanager.agent.heartbeat.Heartbeat
com.wordnik.swaggersocket.protocol.Heartbeat
example.chat.msgtask.HearTbeat

心跳消息任务

@author 胡玮@ritsky
org.apache.ambari.server.agent.HeartBeat
Data model for Ambari Agent to send heartbeat to Ambari Server.
org.apache.slider.server.appmaster.web.rest.agent.HeartBeat
Data model for agent heartbeat for server (ambari or app master).
org.apache.tapestry.services.Heartbeat
Allow for deferred execution of logic, useful when trying to get multiple components to coordinate behavior. A component may add a command to be executed " {@link #end() at the end of the heartbeat}". The classic example of this is a Label and the field it labels; since we don't know which order the two will render, we can't tell if the field's id is correct until after both have rendered.
org.apache.tapestry5.services.Heartbeat
Allows for deferred execution of logic, useful when trying to get multiple components to coordinate behavior. A component may add a command to be executed " {@linkplain #end() at the end of the heartbeat}". The classic example of this is a Label and the field it labels; since we don't know which order the two will render, we can't tell if the field's id is correct until after both have rendered.
The Heartbeat is injected into components via the {@link org.apache.tapestry5.annotations.Environmental} annotation.
org.squirrelframework.foundation.component.Heartbeat
Allows for deferred execution of logic, useful when trying to get multiple components to coordinate behavior. A component may add a command to be executed " {@linkplain #execute() at the end of the heartbeat}". Also, Heartbeats can be nested.

Examples of org.apache.slider.server.appmaster.web.rest.agent.HeartBeat

      resp = mockAps.handleRegistration(reg);
      Assert.assertEquals(0, resp.getResponseId());
      Assert.assertEquals(RegistrationStatus.OK, resp.getResponseStatus());


      // Both issue install command
      HeartBeat hb = new HeartBeat();
      hb.setResponseId(1);
      hb.setHostname("mockcontainer_1___HBASE_MASTER");
      HeartBeatResponse hbr = mockAps.handleHeartBeat(hb);
      Assert.assertEquals(2, hbr.getResponseId());
      Mockito.verify(mockAps, Mockito.times(1)).addInstallCommand(anyString(),
                                                                  anyString(),
                                                                  any(HeartBeatResponse.class),
                                                                  anyString());


      hb = new HeartBeat();
      hb.setResponseId(1);
      hb.setHostname("mockcontainer_1___HBASE_REGIONSERVER");
      hbr = mockAps.handleHeartBeat(hb);
      Assert.assertEquals(2, hbr.getResponseId());
      Mockito.verify(mockAps, Mockito.times(2)).addInstallCommand(anyString(),
                                                                  anyString(),
                                                                  any(HeartBeatResponse.class),
                                                                  anyString());
      // RS succeeds install but does not start
      hb = new HeartBeat();
      hb.setResponseId(2);
      hb.setHostname("mockcontainer_1___HBASE_REGIONSERVER");
      CommandReport cr = new CommandReport();
      cr.setRole("HBASE_REGIONSERVER");
      cr.setRoleCommand("INSTALL");
      cr.setStatus("COMPLETED");
      cr.setFolders(new HashMap<String, String>() {{
        put("a", "b");
      }});
      hb.setReports(Arrays.asList(cr));
      hbr = mockAps.handleHeartBeat(hb);
      Assert.assertEquals(3, hbr.getResponseId());
      Mockito.verify(mockAps, Mockito.times(0)).addStartCommand(anyString(),
                                                                anyString(),
                                                                any(HeartBeatResponse.class),
                                                                anyString());
      // RS still does not start
      hb = new HeartBeat();
      hb.setResponseId(3);
      hb.setHostname("mockcontainer_1___HBASE_REGIONSERVER");
      hbr = mockAps.handleHeartBeat(hb);
      Assert.assertEquals(4, hbr.getResponseId());
      Mockito.verify(mockAps, Mockito.times(0)).addStartCommand(anyString(),
                                                                anyString(),
                                                                any(HeartBeatResponse.class),
                                                                anyString());


      // MASTER succeeds install and issues start
      hb = new HeartBeat();
      hb.setResponseId(2);
      hb.setHostname("mockcontainer_1___HBASE_MASTER");
      cr = new CommandReport();
      cr.setRole("HBASE_MASTER");
      cr.setRoleCommand("INSTALL");
      cr.setStatus("COMPLETED");
      Map<String, String> ap = new HashMap<>();
      ap.put("a.port", "10233");
      cr.setAllocatedPorts(ap);
      hb.setReports(Arrays.asList(cr));
      hbr = mockAps.handleHeartBeat(hb);
      Assert.assertEquals(3, hbr.getResponseId());
      Mockito.verify(mockAps, Mockito.times(1)).addStartCommand(anyString(),
                                                                anyString(),
                                                                any(HeartBeatResponse.class),
                                                                anyString());
      Map<String, String> allocatedPorts = mockAps.getAllocatedPorts();
      Assert.assertTrue(allocatedPorts != null);
      Assert.assertTrue(allocatedPorts.size() == 1);
      Assert.assertTrue(allocatedPorts.containsKey("a.port"));


      // RS still does not start
      hb = new HeartBeat();
      hb.setResponseId(4);
      hb.setHostname("mockcontainer_1___HBASE_REGIONSERVER");
      hbr = mockAps.handleHeartBeat(hb);
      Assert.assertEquals(5, hbr.getResponseId());
      Mockito.verify(mockAps, Mockito.times(1)).addStartCommand(anyString(),
                                                                anyString(),
                                                                any(HeartBeatResponse.class),
                                                                anyString());
      // MASTER succeeds start
      hb = new HeartBeat();
      hb.setResponseId(3);
      hb.setHostname("mockcontainer_1___HBASE_MASTER");
      cr = new CommandReport();
      cr.setRole("HBASE_MASTER");
      cr.setRoleCommand("START");
      cr.setStatus("COMPLETED");
      hb.setReports(Arrays.asList(cr));
      mockAps.handleHeartBeat(hb);
      Mockito.verify(mockAps, Mockito.times(1)).addGetConfigCommand(anyString(),
                                                                    anyString(),
                                                                    any(HeartBeatResponse.class));


      // RS starts now
      hb = new HeartBeat();
      hb.setResponseId(5);
      hb.setHostname("mockcontainer_1___HBASE_REGIONSERVER");
      hbr = mockAps.handleHeartBeat(hb);
      Assert.assertEquals(6, hbr.getResponseId());
      Mockito.verify(mockAps, Mockito.times(2)).addStartCommand(anyString(),
                                                                anyString(),
                                                                any(HeartBeatResponse.class),

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Examples of org.apache.tapestry.services.Heartbeat

    @Test
    public void trigger_immediate()
    {
        FormSupport support = mockFormSupport();
        ComponentResources resources = mockComponentResources();
        Heartbeat heartbeat = new HeartbeatImpl();
        Request request = mockRequest();


        String elementName = "myname";


        train_getParameter(request, elementName, "login");


        replay();


        heartbeat.begin();


        Submit submit = new Submit(request);


        submit.setup(resources, support, heartbeat);
        submit.setDefer(false);


        submit.processSubmission(support, elementName);


        verify();


        expect(resources.triggerEvent(Submit.SELECTED_EVENT, null, null)).andReturn(false);


        replay();


        heartbeat.end();


        verify();


    }

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Examples of org.apache.tapestry.services.Heartbeat

public class LoopTest extends InternalBaseTestCase
{
    @Test
    public void non_empty_iterator()
    {
        Heartbeat hb = mockHeartbeat();


        // Really hard to test the exact timing of all this; it will have to
        // be "proven" by integration tests.


        hb.begin();
        getMocksControl().times(3);


        hb.end();
        getMocksControl().times(3);


        replay();


        Loop loop = new Loop();

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Examples of org.apache.tapestry.services.Heartbeat

    @Test
    public void trigger_immediate()
    {
        FormSupport support = newFormSupport();
        ComponentResources resources = mockComponentResources();
        Heartbeat heartbeat = new HeartbeatImpl();


        String elementName = "myname";


        train_getParameterValue(support, elementName, "login");


        replay();


        heartbeat.begin();


        Submit submit = new Submit();


        submit.setup(resources, support, heartbeat);
        submit.setDefer(false);


        submit.processSubmission(support, elementName);


        verify();


        expect(resources.triggerEvent(Submit.SELECTED_EVENT, null, null)).andReturn(false);


        replay();


        heartbeat.end();


        verify();


    }

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Examples of org.apache.tapestry.services.Heartbeat

    @Test
    public void trigger_immediate()
    {
        FormSupport support = mockFormSupport();
        ComponentResources resources = mockComponentResources();
        Heartbeat heartbeat = new HeartbeatImpl();
        Request request = mockRequest();


        String elementName = "myname";


        train_getParameter(request, elementName, "login");


        replay();


        heartbeat.begin();


        Submit submit = new Submit(request);


        submit.setup(resources, support, heartbeat);
        submit.setDefer(false);


        submit.processSubmission(support, elementName);


        verify();


        expect(resources.triggerEvent(Submit.SELECTED_EVENT, null, null)).andReturn(false);


        replay();


        heartbeat.end();


        verify();
    }

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Examples of org.apache.tapestry.services.Heartbeat

        _formSupport = new FormSupportImpl(_paramLookup);


        _environment.push(ValidationTracker.class, _tracker);
        _environment.push(FormSupport.class, _formSupport);


        Heartbeat heartbeat = new HeartbeatImpl();


        _environment.push(Heartbeat.class, heartbeat);


        heartbeat.begin();


        try
        {
            final Holder<ActionResponseGenerator> holder = Holder.create();


            ComponentEventHandler handler = new ComponentEventHandler()
            {
                public boolean handleResult(Object result, Component component,
                        String methodDescription)
                {
                    if (result instanceof Boolean) return ((Boolean) result);


                    holder.put(_eventResultProcessor.processComponentEvent(
                            result,
                            component,
                            methodDescription));


                    return true; // Abort other event processing.
                }
            };


            _resources.triggerEvent(PREPARE, context, handler);


            if (holder.hasValue()) return holder.get();


            // TODO: Ajax stuff will eventually mean there are multiple values for this parameter
            // name


            String actionsBase64 = _paramLookup.getParameter(FORM_DATA);


            try
            {
                ObjectInputStream ois = new Base64ObjectInputStream(actionsBase64);


                while (true)
                {
                    String componentId = ois.readUTF();
                    ComponentAction action = (ComponentAction) ois.readObject();


                    Component component = _source.getComponent(componentId);


                    action.execute(component);
                }
            }
            catch (EOFException ex)
            {
                // Expected.
            }
            catch (Exception ex)
            {
                throw new RuntimeException(ex);
            }


            heartbeat.end();


            ValidationTracker tracker = _environment.peek(ValidationTracker.class);


            // Let the listeners peform any final validations

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Examples of org.apache.tapestry.services.Heartbeat

        _formSupport = new FormSupportImpl(_paramLookup);


        _environment.push(ValidationTracker.class, _tracker);
        _environment.push(FormSupport.class, _formSupport);


        Heartbeat heartbeat = new HeartbeatImpl();


        _environment.push(Heartbeat.class, heartbeat);


        heartbeat.begin();


        try
        {
            final Holder<ActionResponseGenerator> holder = Holder.create();


            ComponentEventHandler handler = new ComponentEventHandler()
            {
                public boolean handleResult(Object result, Component component,
                        String methodDescription)
                {
                    if (result instanceof Boolean)
                        return ((Boolean) result);


                    holder.put(_eventResultProcessor.processComponentEvent(
                            result,
                            component,
                            methodDescription));


                    return true; // Abort other event processing.
                }
            };


            _resources.triggerEvent(PREPARE, context, handler);


            if (holder.hasValue())
                return holder.get();


            // TODO: Ajax stuff will eventually mean there are multiple values for this parameter
            // name


            String actionsBase64 = _paramLookup.getParameter(FORM_DATA);


            try
            {
                ObjectInputStream ois = new Base64ObjectInputStream(actionsBase64);


                while (true)
                {
                    String componentId = ois.readUTF();
                    ComponentAction action = (ComponentAction) ois.readObject();


                    Component component = _source.getComponent(componentId);


                    action.execute(component);
                }
            }
            catch (EOFException ex)
            {
                // Expected.
            }
            catch (Exception ex)
            {
                throw new RuntimeException(ex);
            }


            heartbeat.end();


            ValidationTracker tracker = _environment.peek(ValidationTracker.class);


            // Let the listeners peform any final validations

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Examples of org.apache.tapestry.services.Heartbeat

        _formSupport = new FormSupportImpl(_paramLookup);


        _environment.push(ValidationTracker.class, _tracker);
        _environment.push(FormSupport.class, _formSupport);


        Heartbeat heartbeat = new HeartbeatImpl();


        _environment.push(Heartbeat.class, heartbeat);


        heartbeat.begin();


        try
        {
            final Holder<ActionResponseGenerator> holder = Holder.create();


            ComponentEventHandler handler = new ComponentEventHandler()
            {
                public boolean handleResult(Object result, Component component,
                        String methodDescription)
                {
                    if (result instanceof Boolean) return ((Boolean) result);


                    holder.put(_eventResultProcessor.processComponentEvent(
                            result,
                            component,
                            methodDescription));


                    return true; // Abort other event processing.
                }
            };


            _resources.triggerEvent(PREPARE, context, handler);


            if (holder.hasValue()) return holder.get();


            // TODO: Ajax stuff will eventually mean there are multiple values for this parameter
            // name


            String actionsBase64 = _paramLookup.getParameter(FORM_DATA);


            try
            {
                ObjectInputStream ois = new Base64ObjectInputStream(actionsBase64);


                while (true)
                {
                    String componentId = ois.readUTF();
                    ComponentAction action = (ComponentAction) ois.readObject();


                    Component component = _source.getComponent(componentId);


                    action.execute(component);
                }
            }
            catch (EOFException ex)
            {
                // Expected.
            }
            catch (Exception ex)
            {
                throw new RuntimeException(ex);
            }


            heartbeat.end();


            ValidationTracker tracker = _environment.peek(ValidationTracker.class);


            // Let the listeners peform any final validations

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Examples of org.apache.tapestry.services.Heartbeat

        Runnable r1 = mockRunnable();
        Runnable r2 = mockRunnable();


        replay();


        Heartbeat hb = new HeartbeatImpl();


        hb.begin();


        hb.defer(r1);
        hb.defer(r2);


        verify();


        r1.run();
        r2.run();


        replay();


        hb.end();


        verify();
    }

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Examples of org.apache.tapestry.services.Heartbeat

        Runnable r2 = mockRunnable();
        Runnable r3 = mockRunnable();


        replay();


        Heartbeat hb = new HeartbeatImpl();


        hb.begin();


        hb.defer(r1);
        hb.defer(r2);


        hb.begin();


        hb.defer(r3);


        verify();


        r3.run();


        replay();


        hb.end();


        verify();


        r1.run();
        r2.run();


        replay();


        hb.end();


        verify();
    }

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