103 lines
4.3 KiB
Java
103 lines
4.3 KiB
Java
/*
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* Copyright 2020-2020 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package io.spring.cloudevent;
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import java.util.function.Function;
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import org.junit.jupiter.api.Test;
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import org.springframework.boot.SpringApplication;
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import org.springframework.cloud.function.cloudevent.CloudEventMessageUtils;
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import org.springframework.cloud.function.context.FunctionCatalog;
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import org.springframework.context.ConfigurableApplicationContext;
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import org.springframework.messaging.Message;
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import org.springframework.messaging.support.MessageBuilder;
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/**
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*
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* @author Oleg Zhurakousky
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*
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*/
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public class CloudeventDemoApplicationFunctionTests {
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@Test
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public void demoPureFunctionInvocation() {
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try(ConfigurableApplicationContext context = SpringApplication.run(CloudeventDemoApplication.class)) {
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FunctionCatalog catalog = context.getBean(FunctionCatalog.class);
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Message<String> binaryCloudEventMessage = MessageBuilder
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.withPayload("{\"releaseDate\":\"24-03-2004\", \"releaseName\":\"Spring Framework\", \"version\":\"1.0\"}")
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.copyHeaders(CloudEventMessageUtils.get("spring.io/spring-event", "com.example.springevent"))
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.build();
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/*
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* NOTE how it makes no difference what the actual function signature
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* is (see `asPOJOMessage` and `asPOJO` specifically). Type conversion will happen
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* inside spring-cloud-function.
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*/
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Function<Message<String>, Message<String>> asPojoMessage = catalog.lookup("asPOJOMessage");
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System.out.println(asPojoMessage.apply(binaryCloudEventMessage));
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Function<Message<String>, Message<String>> asPojo = catalog.lookup("asPOJO");
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System.out.println(asPojo.apply(binaryCloudEventMessage));
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Function<Message<String>, Message<String>> asString = catalog.lookup("asString");
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System.out.println(asString.apply(binaryCloudEventMessage));
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Function<Message<String>, Message<String>> asStringMessage = catalog.lookup("asStringMessage");
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System.out.println(asStringMessage.apply(binaryCloudEventMessage));
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}
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}
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@Test
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public void demoPureFunctionProduceConsumeCloudEvent() {
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try(ConfigurableApplicationContext context = SpringApplication.run(CloudeventDemoApplication.class)) {
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FunctionCatalog catalog = context.getBean(FunctionCatalog.class);
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Message<String> binaryCloudEventMessage = MessageBuilder
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.withPayload("{\"releaseDate\":\"24-03-2004\", \"releaseName\":\"Spring Framework\", \"version\":\"1.0\"}")
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.copyHeaders(CloudEventMessageUtils.get("spring.io/spring-event", "com.example.springevent"))
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.build();
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/*
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* NOTE how it makes no difference what the actual function signature
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* is (see `asPOJOMessage` and `asPOJO` specifically). Type conversion will happen
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* inside spring-cloud-function.
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*/
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Function<Message<String>, Message<String>> asPojoMessage = catalog.lookup("consumeAndProduceCloudEvent");
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System.out.println(asPojoMessage.apply(binaryCloudEventMessage));
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}
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}
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@Test
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public void demoPureFunctionProduceConsumeCloudEventAsPojo() {
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try(ConfigurableApplicationContext context = SpringApplication.run(CloudeventDemoApplication.class)) {
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FunctionCatalog catalog = context.getBean(FunctionCatalog.class);
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Message<String> binaryCloudEventMessage = MessageBuilder
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.withPayload("{\"releaseDate\":\"24-03-2004\", \"releaseName\":\"Spring Framework\", \"version\":\"1.0\"}")
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.copyHeaders(CloudEventMessageUtils.get("spring.io/spring-event", "com.example.springevent"))
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.build();
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/*
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* NOTE how it makes no difference what the actual function signature
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* is (see `asPOJOMessage` and `asPOJO` specifically). Type conversion will happen
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* inside spring-cloud-function.
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*/
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Function<Message<String>, Message<String>> asPojoMessage = catalog.lookup("consumeAndProduceCloudEventAsPojoToPojo");
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System.out.println(asPojoMessage.apply(binaryCloudEventMessage));
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}
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}
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}
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