org.jmxtrans.agent

Class ExpressionLanguageEngineImpl

java.lang.Object

org.jmxtrans.agent.ExpressionLanguageEngineImpl

All Implemented Interfaces:

ExpressionLanguageEngine

public class ExpressionLanguageEngineImpl
extends Object
implements ExpressionLanguageEngine

Author:

Cyrille Le Clerc

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ExpressionLanguageEngineImpl.StaticEvaluator

Field Summary

Fields

Modifier and Type	Field and Description
protected Logger	logger

Constructor Summary

Constructors

Constructor and Description
ExpressionLanguageEngineImpl()

Method Summary

Modifier and Type	Method and Description
Map<String,Callable<String>>	getExpressionEvaluators()
void	registerExpressionEvaluator(String expression, Callable<String> evaluator) Registers an expression evaluator with a static value.
void	registerExpressionEvaluator(String expression, String value) Registers an expression evaluator with a static value.
String	resolveExpression(String expression) Replace all the '#' based keywords (e.g.
String	resolveExpression(String expression, ObjectName exactObjectName)

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected final Logger logger

Constructor Detail

ExpressionLanguageEngineImpl

public ExpressionLanguageEngineImpl()

Method Detail

resolveExpression

@Nonnull
public String resolveExpression(@Nonnull
                                         String expression)

Replace all the '#' based keywords (e.g. #hostname#) by their value.

Specified by:

resolveExpression in interface ExpressionLanguageEngine

Parameters:

expression - the expression to resolve (e.g. "servers.#hostname#.")

Returns:

the resolved expression (e.g. "servers.tomcat5")

resolveExpression

@Nonnull
public String resolveExpression(@Nonnull
                                         String expression,
                                         @Nonnull
                                         ObjectName exactObjectName)

Specified by:

resolveExpression in interface ExpressionLanguageEngine

registerExpressionEvaluator

public void registerExpressionEvaluator(String expression,
                                        Callable<String> evaluator)

Registers an expression evaluator with a static value.

registerExpressionEvaluator

public void registerExpressionEvaluator(String expression,
                                        String value)

Registers an expression evaluator with a static value.

getExpressionEvaluators

@Nonnull
public Map<String,Callable<String>> getExpressionEvaluators()