components/camel-jcache/src/test/java/org/apache/camel/component/jcache/policy/SpringJCachePolicyTest.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.
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package org.apache.camel.component.jcache.policy;

import javax.cache.Cache;

import org.apache.camel.component.mock.MockEndpoint;
import org.apache.camel.test.spring.CamelSpringTestSupport;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import static org.apache.camel.component.jcache.policy.JCachePolicyTestBase.*;

public class SpringJCachePolicyTest extends CamelSpringTestSupport {

    @Override
    protected AbstractApplicationContext createApplicationContext() {
        return new ClassPathXmlApplicationContext("org/apache/camel/component/jcache/policy/SpringJCachePolicyTest.xml");
    }

    @BeforeClass
    public static void beforeAll() {
        System.setProperty("hazelcast.config", "classpath:org/apache/camel/component/jcache/policy/hazelcast-spring.xml");
    }

    @AfterClass
    public static void afterAll() {
        System.clearProperty("hazelcast.config");
    }

    @Before
    public void before() {
        //reset mock
        MockEndpoint mock = getMockEndpoint("mock:spring");
        mock.reset();
        mock.whenAnyExchangeReceived(e ->
            e.getMessage().setBody(generateValue(e.getMessage().getBody(String.class))));
    }

    //Verify value gets cached and route is not executed for the second time
    @Test
    public void testXmlDslValueGetsCached() throws Exception {
        final String key = randomString();
        MockEndpoint mock = getMockEndpoint("mock:spring");

        //Send first, key is not in cache
        Object responseBody = this.template().requestBody("direct:spring", key);

        //We got back the value, mock was called once, value got cached.
        Cache cache = lookupCache("spring");
        assertEquals(generateValue(key), cache.get(key));
        assertEquals(generateValue(key), responseBody);
        assertEquals(1, mock.getExchanges().size());

        //Send again, key is already in cache
        responseBody = this.template().requestBody("direct:spring", key);

        //We got back the stored value, but the mock was not called again
        assertEquals(generateValue(key), cache.get(key));
        assertEquals(generateValue(key), responseBody);
        assertEquals(1, mock.getExchanges().size());
    }

    //Verify if we call the route with different keys, both gets cached
    @Test
    public void testXmlDslDifferent() throws Exception {
        final String key1 = randomString();
        MockEndpoint mock = getMockEndpoint("mock:spring");

        //Send first, key is not in cache
        Object responseBody = this.template().requestBody("direct:spring", key1);

        //We got back the value, mock was called once, value got cached.
        Cache cache = lookupCache("spring");
        assertEquals(generateValue(key1), cache.get(key1));
        assertEquals(generateValue(key1), responseBody);
        assertEquals(1, mock.getExchanges().size());

        //Send again, different key
        final String key2 = randomString();
        responseBody = this.template().requestBody("direct:spring", key2);

        //We got back the stored value, mock was called again, value got cached.
        assertEquals(generateValue(key2), cache.get(key2));
        assertEquals(generateValue(key2), responseBody);
        assertEquals(2, mock.getExchanges().size());
    }

    //Verify policy applies only on the section of the route wrapped
    @Test
    public void testXmlDslPartial() throws Exception {
        final String key = randomString();
        MockEndpoint mock = getMockEndpoint("mock:spring");
        MockEndpoint mockUnwrapped = getMockEndpoint("mock:unwrapped");

        //Send first, key is not in cache
        Object responseBody = this.template().requestBody("direct:spring-partial", key);

        //We got back the value, mock was called once, value got cached.
        Cache cache = lookupCache("spring");
        assertEquals(generateValue(key), cache.get(key));
        assertEquals(generateValue(key), responseBody);
        assertEquals(1, mock.getExchanges().size());
        assertEquals(1, mockUnwrapped.getExchanges().size());

        //Send again, key is already in cache
        responseBody = this.template().requestBody("direct:spring-partial", key);

        //We got back the stored value, but the mock was not called again
        assertEquals(generateValue(key), cache.get(key));
        assertEquals(generateValue(key), responseBody);
        assertEquals(1, mock.getExchanges().size());
        assertEquals(2, mockUnwrapped.getExchanges().size());
    }

    //Use a key expression ${header.mykey}
    @Test
    public void testXmlDslKeyExpression() throws Exception {
        final String key = randomString();
        final String body = randomString();
        MockEndpoint mock = getMockEndpoint("mock:spring");

        //Send first, key is not in cache
        Object responseBody = this.template().requestBodyAndHeader("direct:spring-byheader", body, "mykey", key);

        //We got back the value, mock was called once, value got cached.
        Cache cache = lookupCache("spring");
        assertEquals(generateValue(body), cache.get(key));
        assertEquals(generateValue(body), responseBody);
        assertEquals(1, mock.getExchanges().size());

        //Send again, use another body, but the same key
        responseBody = this.template().requestBodyAndHeader("direct:spring-byheader", randomString(), "mykey", key);

        //We got back the stored value, and the mock was not called again
        assertEquals(generateValue(body), cache.get(key));
        assertEquals(generateValue(body), responseBody);
        assertEquals(1, mock.getExchanges().size());

    }


}