org.mule.el.mvel

Class MVELExpressionExecutor

java.lang.Object

org.mule.el.mvel.MVELExpressionExecutor

All Implemented Interfaces:

ExpressionExecutor<MVELExpressionLanguageContext>

public class MVELExpressionExecutor
extends Object
implements ExpressionExecutor<MVELExpressionLanguageContext>

This MVEL executor uses MVEL ReflectiveAccessorOptimizer implementation rather than the default DynamicOptimizer (which generates byte-code accessors using ASM) because we found that, at least with JDK7, the ReflectiveAccessorOptimizer was fastest in typical Mule use cases.

Field Summary

Fields

Modifier and Type	Field and Description
protected static int	COMPILED_EXPRESSION_MAX_CACHE_SIZE
protected com.google.common.cache.LoadingCache<String,Serializable>	compiledExpressionsCache
protected static String	DISABLE_MEL_EXPRESSION_CACHE
protected org.mule.mvel2.ParserConfiguration	parserConfiguration

Constructor Summary

Constructors

Constructor and Description
MVELExpressionExecutor(org.mule.mvel2.ParserConfiguration parserConfiguration)

Method Summary

Methods

Modifier and Type	Method and Description
Object	execute(String expression, MVELExpressionLanguageContext context) Execute an expression using using the provided context.
Serializable	getCompiledExpression(String expression) Compile an expression.
void	validate(String expression) Validate the expression

Methods inherited from class java.lang.Object

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

Field Detail

DISABLE_MEL_EXPRESSION_CACHE

protected static final String DISABLE_MEL_EXPRESSION_CACHE

See Also:

Constant Field Values

COMPILED_EXPRESSION_MAX_CACHE_SIZE

protected static final int COMPILED_EXPRESSION_MAX_CACHE_SIZE

See Also:

Constant Field Values

parserConfiguration

protected org.mule.mvel2.ParserConfiguration parserConfiguration

compiledExpressionsCache

protected com.google.common.cache.LoadingCache<String,Serializable> compiledExpressionsCache

Constructor Detail

MVELExpressionExecutor

public MVELExpressionExecutor(org.mule.mvel2.ParserConfiguration parserConfiguration)

Method Detail

execute

public Object execute(String expression,
             MVELExpressionLanguageContext context)

Description copied from interface: ExpressionExecutor

Execute an expression using using the provided context.

Specified by:

execute in interface ExpressionExecutor<MVELExpressionLanguageContext>

Returns:

validate

public void validate(String expression)
              throws InvalidExpressionException

Description copied from interface: ExpressionExecutor

Validate the expression

Specified by:

validate in interface ExpressionExecutor<MVELExpressionLanguageContext>

Throws:

InvalidExpressionException

getCompiledExpression

public Serializable getCompiledExpression(String expression)

Compile an expression. If such expression was compiled before then return the compilation output from a cache.

Parameters:

expression - Expression to be compiled

Returns:

A Serializable object representing the compiled expression