modules/client/src/test/java/org/apache/ignite/client/ReconnectTest.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.ignite.client;

import static org.apache.ignite.internal.testframework.IgniteTestUtils.assertThrowsWithCause;
import static org.apache.ignite.internal.util.IgniteUtils.closeAll;
import static org.junit.jupiter.api.Assertions.assertArrayEquals;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;

import org.apache.ignite.Ignite;
import org.apache.ignite.client.IgniteClient.Builder;
import org.apache.ignite.client.fakes.FakeIgnite;
import org.apache.ignite.client.fakes.FakeIgniteTables;
import org.apache.ignite.internal.testframework.BaseIgniteAbstractTest;
import org.apache.ignite.internal.testframework.IgniteTestUtils;
import org.apache.ignite.network.ClusterNode;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;

/**
 * Tests thin client reconnect.
 */
public class ReconnectTest extends BaseIgniteAbstractTest {
    /** Test server. */
    private TestServer server;

    /** Test server 2. */
    private TestServer server2;

    @AfterEach
    void tearDown() throws Exception {
        closeAll(server, server2);
    }

    @Test
    public void clientReconnectsToAnotherAddressOnNodeFail() throws Exception {
        FakeIgnite ignite1 = new FakeIgnite();
        ((FakeIgniteTables) ignite1.tables()).createTable("t");

        server = new TestServer(0, ignite1, null, null, null, AbstractClientTest.clusterId, null, 10905);

        var client = IgniteClient.builder()
                .addresses("127.0.0.1:10905", "127.0.0.1:10950", "127.0.0.1:10960")
                .retryPolicy(new RetryLimitPolicy().retryLimit(100))
                .build();

        assertEquals("t", client.tables().tables().get(0).name());

        server.close();

        FakeIgnite ignite2 = new FakeIgnite();
        ((FakeIgniteTables) ignite2.tables()).createTable("t2");

        server2 = new TestServer(0, ignite2, null, null, null, AbstractClientTest.clusterId, null, 10950);

        assertEquals("t2", client.tables().tables().get(0).name());
    }

    @Test
    @SuppressWarnings("ThrowableNotThrown")
    public void testOperationFailsWhenAllServersFail() throws Exception {
        FakeIgnite ignite1 = new FakeIgnite();
        ((FakeIgniteTables) ignite1.tables()).createTable("t");

        server = AbstractClientTest.startServer(0, ignite1);

        var client = IgniteClient.builder()
                .addresses("127.0.0.1:" + server.port(), "127.0.0.1:10960")
                .build();

        assertEquals("t", client.tables().tables().get(0).name());

        server.close();

        assertThrowsWithCause(() -> client.tables().tables(), IgniteClientConnectionException.class);
    }

    @ParameterizedTest
    @ValueSource(booleans = { true, false })
    public void testClientRepairsBackgroundConnectionsPeriodically(boolean reconnectEnabled) throws Exception {
        startTwoServers();

        Builder builder = IgniteClient.builder()
                .addresses("127.0.0.1:10901", "127.0.0.1:10902", "127.0.0.1:10903")
                .reconnectInterval(reconnectEnabled ? 50 : 0)
                .heartbeatInterval(50);

        try (var client = builder.build()) {
            waitForConnections(client, 2);

            server2.close();
            waitForConnections(client, 1);

            Ignite ignite = new FakeIgnite();
            server2 = new TestServer(0, ignite, null, null, "node3", AbstractClientTest.clusterId, null, 10903);

            if (reconnectEnabled) {
                waitForConnections(client, 2);

                String[] nodeNames = client.connections().stream().map(ClusterNode::name).sorted().toArray(String[]::new);
                assertArrayEquals(new String[]{"node1", "node3"}, nodeNames);
            } else {
                Thread.sleep(100);
                assertEquals(1, client.connections().size());
            }
        }
    }

    @Test
    public void testFullClusterRestart() throws Exception {
        startTwoServers();

        Builder builder = IgniteClient.builder()
                .addresses("127.0.0.1:10901", "127.0.0.1:10902")
                .reconnectInterval(50)
                .heartbeatInterval(50);

        try (var client = builder.build()) {
            waitForConnections(client, 2);

            closeAll(server, server2);
            waitForConnections(client, 0);

            startTwoServers();
            waitForConnections(client, 2);
        }
    }

    private void startTwoServers() {
        Ignite ignite = new FakeIgnite();
        server = new TestServer(0, ignite, null, null, "node1", AbstractClientTest.clusterId, null, 10901);
        Ignite ignite1 = new FakeIgnite();
        server2 = new TestServer(0, ignite1, null, null, "node2", AbstractClientTest.clusterId, null, 10902);
    }

    private static void waitForConnections(IgniteClient client, int expectedConnections) throws InterruptedException {
        assertTrue(IgniteTestUtils.waitForCondition(
                        () -> client.connections().size() == expectedConnections, 5000),
                () -> "Client should have " + expectedConnections + " connections: " + client.connections().size());
    }
}