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 interface	ExpressionLanguageEngineImpl.Function
static class	ExpressionLanguageEngineImpl.StaticFunction

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
void	registerExpressionEvaluator(String expression, ExpressionLanguageEngineImpl.Function evaluator) 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, String attribute, String compositeDataKey, Integer position)

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,
                                         @Nullable
                                         String attribute,
                                         @Nullable
                                         String compositeDataKey,
                                         @Nullable
                                         Integer position)

Specified by:

resolveExpression in interface ExpressionLanguageEngine

registerExpressionEvaluator

public void registerExpressionEvaluator(@Nonnull
                                        String expression,
                                        @Nonnull
                                        ExpressionLanguageEngineImpl.Function evaluator)

Registers an expression evaluator with a static value.