tests/integration/src/test/java/org/apache/pulsar/tests/integration/schema/SchemaTest.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.pulsar.tests.integration.schema;

import static org.apache.pulsar.common.naming.TopicName.PUBLIC_TENANT;

import com.google.common.collect.Sets;
import lombok.extern.slf4j.Slf4j;
import org.apache.pulsar.client.admin.PulsarAdmin;
import org.apache.pulsar.client.api.Producer;
import org.apache.pulsar.client.api.PulsarClient;
import org.apache.pulsar.client.api.Schema;
import org.apache.pulsar.common.naming.TopicDomain;
import org.apache.pulsar.common.naming.TopicName;
import org.apache.pulsar.tests.integration.schema.Schemas.Person;
import org.apache.pulsar.tests.integration.schema.Schemas.Student;
import org.apache.pulsar.tests.integration.suites.PulsarTestSuite;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;

/**
 * Test Pulsar Schema.
 */
@Slf4j
public class SchemaTest extends PulsarTestSuite {

    private PulsarClient client;
    private PulsarAdmin admin;

    @BeforeMethod
    public void setup() throws Exception {
        this.client = PulsarClient.builder()
            .serviceUrl(pulsarCluster.getPlainTextServiceUrl())
            .build();
        this.admin = PulsarAdmin.builder()
            .serviceHttpUrl(pulsarCluster.getHttpServiceUrl())
            .build();
    }

    @Test
    public void testCreateSchemaAfterDeletion() throws Exception {
        final String tenant = PUBLIC_TENANT;
        final String namespace = "test-namespace-" + randomName(16);
        final String topic = "test-create-schema-after-deletion";
        final String fqtn = TopicName.get(
             TopicDomain.persistent.value(),
             tenant,
             namespace,
             topic
         ).toString();

        admin.namespaces().createNamespace(
            tenant + "/" + namespace,
            Sets.newHashSet(pulsarCluster.getClusterName())
        );

        // Create a topic with `Person`
        try (Producer<Person> producer = client.newProducer(Schema.AVRO(Person.class))
             .topic(fqtn)
             .create()
        ) {
            Person person = new Person();
            person.setName("Tom Hanks");
            person.setAge(60);

            producer.send(person);

            log.info("Successfully published person : {}", person);
        }

        log.info("Deleting schema of topic {}", fqtn);
        // delete the schema
        admin.schemas().deleteSchema(fqtn);
        log.info("Successfully deleted schema of topic {}", fqtn);

        // after deleting the topic, try to create a topic with a different schema
        try (Producer<Student> producer = client.newProducer(Schema.AVRO(Student.class))
             .topic(fqtn)
             .create()
        ) {
            Student student = new Student();
            student.setName("Tom Jerry");
            student.setAge(30);
            student.setGpa(6);
            student.setGpa(10);

            producer.send(student);

            log.info("Successfully published student : {}", student);
        }
    }


}