camel-2.8.x/camel-core/src/test/java/org/apache/camel/converter/FutureConverterTest.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.camel.converter;

import java.sql.Timestamp;
import java.util.concurrent.Future;

import org.apache.camel.ContextTestSupport;
import org.apache.camel.Exchange;
import org.apache.camel.NoTypeConversionAvailableException;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.impl.DefaultExchange;

/**
 * @version 
 */
public class FutureConverterTest extends ContextTestSupport {

    public void testConvertFuture() {
        Future future = template.asyncRequestBody("direct:foo", "Hello World");

        String out = context.getTypeConverter().convertTo(String.class, future);
        assertEquals("Bye World", out);
    }

    public void testConvertMandatoryFuture() throws Exception {
        Future future = template.asyncRequestBody("direct:foo", "Hello World");

        String out = context.getTypeConverter().mandatoryConvertTo(String.class, future);
        assertEquals("Bye World", out);
    }

    public void testConvertMandatoryFutureWithExchange() throws Exception {
        Exchange exchange = new DefaultExchange(context);
        Future future = template.asyncRequestBody("direct:foo", "Hello World");

        String out = context.getTypeConverter().mandatoryConvertTo(String.class, exchange, future);
        assertEquals("Bye World", out);
    }

    public void testConvertMandatoryFutureWithExchangeFailed() throws Exception {
        Exchange exchange = new DefaultExchange(context);
        Future future = template.asyncRequestBody("direct:foo", "Hello World");

        try {
            context.getTypeConverter().mandatoryConvertTo(Timestamp.class, exchange, future);
            fail("Should have thrown an exception");
        } catch (NoTypeConversionAvailableException e) {
            // expected
        }
    }

    public void testConvertFutureWithExchangeFailed() throws Exception {
        Exchange exchange = new DefaultExchange(context);
        Future future = template.asyncRequestBody("direct:foo", "Hello World");

        Timestamp out = context.getTypeConverter().convertTo(Timestamp.class, exchange, future);
        assertNull(out);
    }

    public void testConvertFutureCancelled() {
        Future future = template.asyncRequestBody("direct:foo", "Hello World");
        future.cancel(true);

        Object out = context.getTypeConverter().convertTo(String.class, future);
        // should be null since its cancelled
        assertNull(out);
    }

    public void testConvertFutureCancelledThenOkay() {
        Future future = template.asyncRequestBody("direct:foo", "Hello World");
        future.cancel(true);

        Object out = context.getTypeConverter().convertTo(String.class, future);
        // should be null since its cancelled
        assertNull(out);

        future = template.asyncRequestBody("direct:foo", "Hello World");

        out = context.getTypeConverter().convertTo(String.class, future);
        // not cancelled so we get the result this time
        assertEquals("Bye World", out);
    }

    @Override
    protected RouteBuilder createRouteBuilder() throws Exception {
        return new RouteBuilder() {
            @Override
            public void configure() throws Exception {
                from("direct:foo").delay(500).transform(constant("Bye World"));
            }
        };
    }
}