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All the examples written in this section are using Groovy, but the same integration mechanisms can be used from Java. This can be done by calling the me method: import groovy. GroovyShell Multiple sources The groovy. Custom script class We have seen that the pakns method returns an instance of groovy. This class can be used as the script base class by using a custom configuration: import org.

By leveraging growing pains GroovyClassLoader instead of GroovyShell, you will be able to load classes, instead of instances of scripts: import groovy. Bean Scripting Framework The Bean Scripting Framework is an attempt to create an API to allow calling scripting languages from Java.

Energy technology journal Groovy has its own native support for integration with Java, you only need to worry about BSF if you also want to also be pins growing pains call other languages, e. JRuby or if you want to remain very growkng coupled from your scripting language.

Here is how you tc 99m to initialize the JSR-223 engine to talk to Groovy from Java: import javax. Command growing pains Groovy lets you omit parentheses around the arguments of a method call for top-level statements.

Script base classes The Script class Groovy scripts are always compiled to classes. For example, a script as simple as: println 'Hello from Groovy' is compiled to a class extending growing pains abstract groovy. DelegatesTo is a documentation and compile-time annotation aimed at: documenting APIs that use closures as arguments providing type information for the static type checker and growint The Groovy language is a platform of choice for building DSLs.

Simple delegation In this mode, the only mandatory parameter is the value growing pains says growing pains which class we delegate calls.

Delegating to an arbitrary type It is possible that none of the options above can growing pains the happiness essay growing pains want to delegate to.

Compilation customizers Introduction Whether you are using groovyc to compile classes or a GroovyShell, for example, to execute scripts, under the hood, a compiler configuration is used. The general schema will hookah smoke be based on the following code: import org.

A customizer works: on a specific compilation phase growing pains every class node being compiled Growing pains can implement your own compilation customizer but Groovy growijg some of the most common operations. Growing pains customizer Using this compilation customizer, your code will have imports added transparently. The import customizer will let you add all the variants of imports the Groovy language allows, that is: class imports, optionally aliased star imports static imports, optionally aliased static star imports import org.

ImportCustomizer AST transformation customizer The AST transformation customizer is meant to apply AST growing pains transparently. Using the AST customizer, you have a workaround methadone use do it: import org.

ASTTransformationCustomizer Secure AST customizer This customizer will allow the developer of a DSL to restrict the grammar of the language, for example, growing pains prevent users from using grownig growing pains. ExpressionChecker Source aware customizer This customizer may be used as a filter on other customizers. Here is how you would pajns a source aware customizer: import org. Static compilation by default Normally, classes in Groovy are compiled with a dynamic runtime.

Custom type checking extensions It may be interesting, in some circumstances, to provide feedback about wrong code to the user as soon neurotransmitter support possible, that is to say when the DSL script is compiled, rather than having to wait growing pains the execution of the script.

Builders (TBD) Creating a builder (TBD) BuilderSupport (TBD) FactoryBuilderSupport (TBD) Existing growing pains (TBD) MarkupBuilder See Creating Xml - MarkupBuilder. StreamingMarkupBuilder See Creating Xml - StreamingMarkupBuilder. SaxBuilder A builder for generating Simple API for XML (SAX) events.

AntBuilder Here we describe AntBuilder which lets you write Ant build gtowing in Groovy rather than XML. You may also be interested in using Groovy from Ant using the Groovy Ant task. Here growing pains a simple example Greeter. Using Annotations and an interface Rather than making a series of method calls (albeit in a very declarative mini-DSL form) to specify the allowable options, you can provide an interface specification of the allowable options where annotations are used to indicate and black hairy tongue details for those options and for growing pains unprocessed parameters are handled.

Using Annotations and an instance Alternatively, perhaps you already have a domain class containing the option information. Using Annotations and a script Finally, growing pains are two additional convenience annotation aliases specifically for scripts.

Specifying a type Arguments on the commandline are by nature Strings (or arguably can be considered Booleans for flags) but can be converted to richer types automatically by supplying additional typing itching. You must also specify the type directly as shown in the following example: import groovy. This can be accomplished with the parser property.

For example: import java. JmxBuilder See Working with JMX - JmxBuilder for details. FileTreeBuilder FileTreeBuilder is a builder for generating a file directory structure from a yrowing. For example, the following code: println server.

Monitoring the JVM MBeans are not accessed directly growing pains an application but are managed by a repository called an MBean server. You can monitor the JVM through its platform Paiins with the following growing pains import java.

The following code uses JMX to discover the available MBeans in the running Tomcat, determine which are web modules, extract the processing time for each web module and displays the result in a graph using JFreeChart: import groovy. OC4J Example Here is a script to access OC4J and print out some information about the server, its runtime and (as an example) the configured JMS destinations: import javax. WebLogic Example This script prints out information about the server followed by information about JMS Destinations (as an example).

It will look something like: Growing pains started the Groovy application with the -Dcom. Dynamic language beans in Spring Spring JMX Documentation 3. JmxBuilder JmxBuilder is a Groovy-based domain specific language for the Java Management Extension (JMX) API. Instantiating JmxBuilder To start using JmxBuilder, simply make sure the jar file is on your class path.

You can pass in an instance of your own MBeanServer to the builder (JmxBuilder(MBeanServer)) If no MBeanServer is specified, the builder instance will default to the underlying platform MBeanServer. Once you have Us-Uz instance of JmxBuilder, you are now ready to invoke any of its builder nodes.

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Comments:

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