org.apache.jmeter.timers

## Class SyncTimer

- java.lang.Object
- - org.apache.jmeter.testelement.AbstractTestElement
  - - org.apache.jmeter.timers.SyncTimer

All Implemented Interfaces:
  Serializable, Cloneable, Searchable, TestBean, TestElement, TestStateListener, ThreadListener, Timer

    public class SyncTimer
    extends AbstractTestElement
    implements Timer, Serializable, TestBean, TestStateListener, ThreadListener

The purpose of the SyncTimer is to block threads until X number of threads have been blocked, and then they are all released at once. A SyncTimer can thus create large instant loads at various points of the test plan.

See Also:
  Serialized Form

### Field Summary

### Fields inherited from interface org.apache.jmeter.testelement.TestElement

`COMMENTS, ENABLED, GUI_CLASS, NAME, TEST_CLASS`

### Constructor Summary

Constructors
Constructor and Description
`SyncTimer()`

### Method Summary

All Methods Instance Methods Concrete Methods
`Object` `clone()` We have to control the cloning process because we need some cross-thread communication if our synctimers are to be able to determine when to block and when to release.
`long` `delay()` This method is called after a sampling process is done to know how much time the sampling thread has to wait until sampling again.
`int` `getGroupSize()`
`long` `getTimeoutInMs()`
`void` `setGroupSize(int numThreads)`
`void` `setTimeoutInMs(long timeoutInMs)`
`void` `testEnded()` Called once for all threads after the end of a test.
`void` `testEnded(String host)` Reset timerCounter
`void` `testStarted()` Called just before the start of the test from the main engine thread.
`void` `testStarted(String host)` Reset timerCounter
`void` `threadFinished()` Called for each thread after all samples have been processed.
`void` `threadStarted()` Called for each thread before starting sampling.

### Methods inherited from class org.apache.jmeter.testelement.AbstractTestElement

`addPropertiesValues, addProperty, addProperty, addTestElement, canRemove, clear, clearTemporary, clearTestElementChildren, emptyTemporary, equals, getComment, getName, getProperty, getPropertyAsBoolean, getPropertyAsBoolean, getPropertyAsDouble, getPropertyAsFloat, getPropertyAsInt, getPropertyAsInt, getPropertyAsLong, getPropertyAsLong, getPropertyAsString, getPropertyAsString, getSearchableTokens, getThreadContext, getThreadName, hashCode, isEnabled, isRunningVersion, isTemporary, logProperties, mergeIn, propertyIterator, recoverRunningVersion, removeProperty, setComment, setEnabled, setName, setProperty, setProperty, setProperty, setProperty, setProperty, setProperty, setProperty, setProperty, setProperty, setRunningVersion, setTemporary, setThreadContext, setThreadName, traverse, traverseCollection, traverseMap, traverseProperty`

### Methods inherited from class java.lang.Object

`finalize, getClass, notify, notifyAll, toString, wait, wait, wait`

### Methods inherited from interface org.apache.jmeter.timers.Timer

`isModifiable`

### Methods inherited from interface org.apache.jmeter.testelement.TestElement

`removed`

### Constructor Detail

#### SyncTimer

    public SyncTimer()

### Method Detail

#### getGroupSize

    public int getGroupSize()

Returns:
  Returns the numThreads.

#### setGroupSize

    public void setGroupSize(int numThreads)

Parameters:
  `numThreads` - The numThreads to set.

#### delay

    public long delay()

This method is called after a sampling process is done to know how much time the sampling thread has to wait until sampling again.

Specified by:
  `delay` in interface `Timer`
Returns:
  the computed delay value.

#### clone

    public Object clone()

We have to control the cloning process because we need some cross-thread communication if our synctimers are to be able to determine when to block and when to release.

Specified by:
  `clone` in interface `TestElement`
Overrides:
  `clone` in class `AbstractTestElement`

#### testEnded

    public void testEnded()

Called once for all threads after the end of a test. This will use the same element instances as at the start of the test.

N.B. testStarted() and testEnded() are called from different threads.

Specified by:
  `testEnded` in interface `TestStateListener`
See Also:
  `StandardJMeterEngine.stopTest()`

#### testEnded

    public void testEnded(String host)

Reset timerCounter

Specified by:
  `testEnded` in interface `TestStateListener`
Parameters:
  `host` - name of host
See Also:
  `StandardJMeterEngine.stopTest()`

#### testStarted

    public void testStarted()

Called just before the start of the test from the main engine thread. This is before the test elements are cloned. Note that not all the test variables will have been set up at this point.

N.B. testStarted() and testEnded() are called from different threads.

Specified by:
  `testStarted` in interface `TestStateListener`
See Also:
  `StandardJMeterEngine.run()`

#### testStarted

    public void testStarted(String host)

Reset timerCounter

Specified by:
  `testStarted` in interface `TestStateListener`
Parameters:
  `host` - name of host
See Also:
  `StandardJMeterEngine.run()`

#### threadStarted

    public void threadStarted()

Description copied from interface: `ThreadListener`
Called for each thread before starting sampling. WARNING: this is called before any Config test elements are processed, so any properties they define will not have been merged in yet. See org.apache.jmeter.threads.JMeterThread#threadStarted()

Specified by:
  `threadStarted` in interface `ThreadListener`

#### threadFinished

    public void threadFinished()

Description copied from interface: `ThreadListener`
Called for each thread after all samples have been processed. See org.apache.jmeter.threads.JMeterThread#threadFinished(org.apache.jmeter.engine.event.LoopIterationListener)

Specified by:
  `threadFinished` in interface `ThreadListener`

#### getTimeoutInMs

    public long getTimeoutInMs()

Returns:
  the timeoutInMs

#### setTimeoutInMs

    public void setTimeoutInMs(long timeoutInMs)

Parameters:
  `timeoutInMs` - the timeoutInMs to set