org.apache.synapse.mediators.bsf

Class ScriptMediator

java.lang.Object

org.apache.synapse.mediators.AbstractMediator

org.apache.synapse.mediators.bsf.ScriptMediator

All Implemented Interfaces:

org.apache.synapse.aspects.AspectConfigurable, org.apache.synapse.Mediator, org.apache.synapse.SynapseArtifact

public class ScriptMediator
extends org.apache.synapse.mediators.AbstractMediator

A Synapse mediator that calls a function in any scripting language supported by the BSF. The ScriptMediator supports scripts specified in-line or those loaded through a registry

    <script [key="entry-key"]
      [function="script-function-name"] language="nashornJs|javascript|groovy|ruby">
      (text | xml)?
    </script>
 

The function is an optional attribute defining the name of the script function to call, if not specified it defaults to a function named 'mediate'. The function takes a single parameter which is the Synapse MessageContext. The function may return a boolean, if it does not then true is assumed.

Field Summary

Fields

Modifier and Type	Field and Description
protected javax.script.ScriptEngine	jsEngine The BSF engine created to validate each JSON payload
protected javax.script.ScriptEngine	scriptEngine The BSF engine created to process each message through the script

Fields inherited from class org.apache.synapse.mediators.AbstractMediator

log, trace, traceState

Constructor Summary

Constructors

Constructor and Description
ScriptMediator(java.lang.String language, java.util.Map<org.apache.synapse.mediators.Value,java.lang.Object> includeKeysMap, org.apache.synapse.mediators.Value key, java.lang.String function, java.lang.ClassLoader classLoader) Create a script mediator for the given language and given script entry key and function.
ScriptMediator(java.lang.String language, java.lang.String scriptSourceCode, java.lang.ClassLoader classLoader) Create a script mediator for the given language and given script source.

Method Summary

Modifier and Type	Method and Description
java.lang.String	getFunction()
java.util.Map<org.apache.synapse.mediators.Value,java.lang.Object>	getIncludeMap()
org.apache.synapse.mediators.Value	getKey()
java.lang.String	getLanguage()
java.lang.ClassLoader	getLoader()
ScriptEngineWrapper	getNewScriptEngine()
java.lang.String	getScriptSrc()
protected void	initInlineScript() Initialise the Mediator for the inline script
protected void	initScriptEngine()
boolean	isContentAltering()
boolean	mediate(org.apache.synapse.MessageContext synCtx) Perform Script mediation.
protected ScriptEngineWrapper	prepareExternalScript(org.apache.synapse.MessageContext synCtx) Prepares the mediator for the invocation of an external script
void	setLoader(java.lang.ClassLoader loader)

Methods inherited from class org.apache.synapse.mediators.AbstractMediator

auditLog, auditWarn, configure, disableStatistics, disableTracing, divertMediationRoute, enableStatistics, enableTracing, getAspectConfiguration, getCommentsList, getDescription, getInputType, getLastSequenceFaultHandler, getLog, getMediatorName, getMediatorPosition, getOutputType, getRegisteredMediationFlowPoint, getShortDescription, getTraceState, getType, handleException, handleException, isBreakPoint, isContentAware, isSkipEnabled, isStatisticsEnable, isTraceOn, isTraceOrDebugOn, isTracingEnabled, registerMediationFlowPoint, reportCloseStatistics, reportOpenStatistics, setBreakPoint, setCommentsList, setComponentStatisticsId, setDescription, setEffectiveTraceState, setMediatorPosition, setShortDescription, setSkipEnabled, setTraceState, shouldCaptureTracing, shouldTrace, shouldTrace, traceOrDebug, traceOrDebugWarn, unregisterMediationFlowPoint

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

scriptEngine

protected javax.script.ScriptEngine scriptEngine

The BSF engine created to process each message through the script

jsEngine

protected javax.script.ScriptEngine jsEngine

The BSF engine created to validate each JSON payload

Constructor Detail

ScriptMediator

public ScriptMediator(java.lang.String language,
                      java.lang.String scriptSourceCode,
                      java.lang.ClassLoader classLoader)

Create a script mediator for the given language and given script source.

Parameters:

language - the BSF language

scriptSourceCode - the source code of the script

ScriptMediator

public ScriptMediator(java.lang.String language,
                      java.util.Map<org.apache.synapse.mediators.Value,java.lang.Object> includeKeysMap,
                      org.apache.synapse.mediators.Value key,
                      java.lang.String function,
                      java.lang.ClassLoader classLoader)

Create a script mediator for the given language and given script entry key and function.

Parameters:

language - the BSF language

includeKeysMap - Include script keys

key - the registry entry key to load the script

function - the function to be invoked

Method Detail

mediate

public boolean mediate(org.apache.synapse.MessageContext synCtx)

Perform Script mediation.

Parameters:

synCtx - the Synapse message context

Returns:

the boolean result from the script invocation

initInlineScript

protected void initInlineScript()

Initialise the Mediator for the inline script

prepareExternalScript

protected ScriptEngineWrapper prepareExternalScript(org.apache.synapse.MessageContext synCtx)
                                             throws javax.script.ScriptException

Prepares the mediator for the invocation of an external script

Parameters:

synCtx - MessageContext script

Throws:

javax.script.ScriptException - For any errors , when compile the script

initScriptEngine

protected void initScriptEngine()

getLanguage

public java.lang.String getLanguage()

getKey

public org.apache.synapse.mediators.Value getKey()

getFunction

public java.lang.String getFunction()

getScriptSrc

public java.lang.String getScriptSrc()

getIncludeMap

public java.util.Map<org.apache.synapse.mediators.Value,java.lang.Object> getIncludeMap()

getLoader

public java.lang.ClassLoader getLoader()

setLoader

public void setLoader(java.lang.ClassLoader loader)

getNewScriptEngine

public ScriptEngineWrapper getNewScriptEngine()

isContentAltering

public boolean isContentAltering()

Specified by:

isContentAltering in interface org.apache.synapse.Mediator

Overrides:

isContentAltering in class org.apache.synapse.mediators.AbstractMediator