org.grails.async.factory.SynchronousPromiseFactory.groovy Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of grails-async Show documentation

Grails Web Application Framework

There is a newer version: 5.0.2

/*
 * Copyright 2013 SpringSource
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.grails.async.factory

import grails.async.Promise
import grails.async.PromiseList
import groovy.transform.CompileStatic

import java.util.concurrent.TimeUnit

/**
 * A {@link grails.async.PromiseFactory} implementation that constructors promises that execute synchronously.
 * Useful for testing environments.
 *
 * @author Graeme Rocher
 * @since 2.3
 */
@CompileStatic
class SynchronousPromiseFactory extends AbstractPromiseFactory {
    @Override
    def  Promise createPromise(Closure... closures) {
        if (closures.length == 1) {
            return new SynchronousPromise(closures[0])
        }

        def promiseList = new PromiseList()
        for(p in closures) {
            promiseList << p
        }
        return promiseList
    }

    @Override
    def  List waitAll(List> promises) {
        return promises.collect() { Promise p -> p.get() }
    }

    @Override
    def  List waitAll(List> promises, long timeout, TimeUnit units) {
        return promises.collect() { Promise p -> p.get() }
    }

    def  Promise> onComplete(List> promises, Closure callable) {
        try {
            List values = promises.collect { Promise p -> p.get() }
            final result = callable.call(values)
            return new BoundPromise(result)
        } catch (Throwable e) {
            return new BoundPromise(e)
        }
    }

    def  Promise> onError(List> promises, Closure callable) {
        try {
            final values = promises.collect() { Promise p -> p.get() }
            return new BoundPromise>(values)
        } catch (Throwable e) {
            callable.call(e)
            return new BoundPromise(e)
        }
    }
}