Package 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	Description
static interface	ExpressionLanguageEngineImpl.Function
static class	ExpressionLanguageEngineImpl.StaticFunction

Field Summary

Fields

Modifier and Type	Field	Description
protected Logger	logger

Constructor Summary

Constructors

Constructor	Description
ExpressionLanguageEngineImpl()

Method Summary

Modifier and Type	Method	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 Details

logger

protected final Logger logger

Constructor Details

ExpressionLanguageEngineImpl

public ExpressionLanguageEngineImpl()

Method Details

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.