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commit ed195cfedbbcee45b9eee33b054a209b20f09b39
Author: Matthias Pohl <matthias.p...@aiven.io>
AuthorDate: Thu Apr 20 14:42:15 2023 +0200
[hotfix][test] Adds generic testing implementations for LeaderContender and
LeaderElectionDriver
Signed-off-by: Matthias Pohl <matthias.p...@aiven.io>
---
.../TestingGenericLeaderContender.java | 116 +++++++++++++++++++++
.../TestingGenericLeaderElectionDriver.java | 94 +++++++++++++++++
2 files changed, 210 insertions(+)
diff --git
a/flink-runtime/src/test/java/org/apache/flink/runtime/leaderelection/TestingGenericLeaderContender.java
b/flink-runtime/src/test/java/org/apache/flink/runtime/leaderelection/TestingGenericLeaderContender.java
new file mode 100644
index 00000000000..c385cb20c2a
--- /dev/null
+++
b/flink-runtime/src/test/java/org/apache/flink/runtime/leaderelection/TestingGenericLeaderContender.java
@@ -0,0 +1,116 @@
+/*
+ * 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.flink.runtime.leaderelection;
+
+import java.util.UUID;
+import java.util.function.Consumer;
+import java.util.function.Supplier;
+
+/**
+ * {@code TestingGenericLeaderContender} is a more generic testing
implementation of the {@link
+ * LeaderContender} interface.
+ */
+public class TestingGenericLeaderContender implements LeaderContender {
+
+ private final Object lock = new Object();
+
+ private final Consumer<UUID> grantLeadershipConsumer;
+ private final Runnable revokeLeadershipRunnable;
+ private final Consumer<Exception> handleErrorConsumer;
+ private final Supplier<String> getDescriptionSupplier;
+
+ private TestingGenericLeaderContender(
+ Consumer<UUID> grantLeadershipConsumer,
+ Runnable revokeLeadershipRunnable,
+ Consumer<Exception> handleErrorConsumer,
+ Supplier<String> getDescriptionSupplier) {
+ this.grantLeadershipConsumer = grantLeadershipConsumer;
+ this.revokeLeadershipRunnable = revokeLeadershipRunnable;
+ this.handleErrorConsumer = handleErrorConsumer;
+ this.getDescriptionSupplier = getDescriptionSupplier;
+ }
+
+ @Override
+ public void grantLeadership(UUID leaderSessionID) {
+ synchronized (lock) {
+ grantLeadershipConsumer.accept(leaderSessionID);
+ }
+ }
+
+ @Override
+ public void revokeLeadership() {
+ synchronized (lock) {
+ revokeLeadershipRunnable.run();
+ }
+ }
+
+ @Override
+ public void handleError(Exception exception) {
+ synchronized (lock) {
+ handleErrorConsumer.accept(exception);
+ }
+ }
+
+ @Override
+ public String getDescription() {
+ return getDescriptionSupplier.get();
+ }
+
+ public static Builder newBuilder() {
+ return new Builder();
+ }
+
+ /** {@code Builder} for creating {@code TestingGenericLeaderContender}
instances. */
+ public static class Builder {
+ private Consumer<UUID> grantLeadershipConsumer = ignoredSessionID ->
{};
+ private Runnable revokeLeadershipRunnable = () -> {};
+ private Consumer<Exception> handleErrorConsumer = ignoredError -> {};
+ private Supplier<String> getDescriptionSupplier = () -> "testing
contender";
+
+ private Builder() {}
+
+ public Builder setGrantLeadershipConsumer(Consumer<UUID>
grantLeadershipConsumer) {
+ this.grantLeadershipConsumer = grantLeadershipConsumer;
+ return this;
+ }
+
+ public Builder setRevokeLeadershipRunnable(Runnable
revokeLeadershipRunnable) {
+ this.revokeLeadershipRunnable = revokeLeadershipRunnable;
+ return this;
+ }
+
+ public Builder setHandleErrorConsumer(Consumer<Exception>
handleErrorConsumer) {
+ this.handleErrorConsumer = handleErrorConsumer;
+ return this;
+ }
+
+ public Builder setGetDescriptionSupplier(Supplier<String>
getDescriptionSupplier) {
+ this.getDescriptionSupplier = getDescriptionSupplier;
+ return this;
+ }
+
+ public TestingGenericLeaderContender build() {
+ return new TestingGenericLeaderContender(
+ grantLeadershipConsumer,
+ revokeLeadershipRunnable,
+ handleErrorConsumer,
+ getDescriptionSupplier);
+ }
+ }
+}
diff --git
a/flink-runtime/src/test/java/org/apache/flink/runtime/leaderelection/TestingGenericLeaderElectionDriver.java
b/flink-runtime/src/test/java/org/apache/flink/runtime/leaderelection/TestingGenericLeaderElectionDriver.java
new file mode 100644
index 00000000000..ba99288968b
--- /dev/null
+++
b/flink-runtime/src/test/java/org/apache/flink/runtime/leaderelection/TestingGenericLeaderElectionDriver.java
@@ -0,0 +1,94 @@
+/*
+ * 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.flink.runtime.leaderelection;
+
+import org.apache.flink.util.function.ThrowingRunnable;
+
+import java.util.function.Consumer;
+import java.util.function.Supplier;
+
+/**
+ * {@code TestingGenericLeaderElectionDriver} is test implementation of {@link
LeaderElectionDriver}
+ * to support test cases in the most generic way.
+ */
+public class TestingGenericLeaderElectionDriver implements
LeaderElectionDriver {
+
+ private final Consumer<LeaderInformation> writeLeaderInformationConsumer;
+ private final Supplier<Boolean> hasLeadershipSupplier;
+ private final ThrowingRunnable<Exception> closeRunnable;
+
+ private TestingGenericLeaderElectionDriver(
+ Consumer<LeaderInformation> writeLeaderInformationConsumer,
+ Supplier<Boolean> hasLeadershipSupplier,
+ ThrowingRunnable<Exception> closeRunnable) {
+ this.writeLeaderInformationConsumer = writeLeaderInformationConsumer;
+ this.hasLeadershipSupplier = hasLeadershipSupplier;
+ this.closeRunnable = closeRunnable;
+ }
+
+ @Override
+ public void writeLeaderInformation(LeaderInformation leaderInformation) {
+ writeLeaderInformationConsumer.accept(leaderInformation);
+ }
+
+ @Override
+ public boolean hasLeadership() {
+ return hasLeadershipSupplier.get();
+ }
+
+ @Override
+ public void close() throws Exception {
+ closeRunnable.run();
+ }
+
+ public static Builder newBuilder() {
+ return new Builder();
+ }
+
+ /** {@code Builder} for creating {@code TestingGenericLeaderContender}
instances. */
+ public static class Builder {
+ private Consumer<LeaderInformation> writeLeaderInformationConsumer =
+ ignoredLeaderInformation -> {};
+ private Supplier<Boolean> hasLeadershipSupplier = () -> false;
+ private ThrowingRunnable<Exception> closeRunnable = () -> {};
+
+ private Builder() {}
+
+ public Builder setWriteLeaderInformationConsumer(
+ Consumer<LeaderInformation> writeLeaderInformationConsumer) {
+ this.writeLeaderInformationConsumer =
writeLeaderInformationConsumer;
+ return this;
+ }
+
+ public Builder setHasLeadershipSupplier(Supplier<Boolean>
hasLeadershipSupplier) {
+ this.hasLeadershipSupplier = hasLeadershipSupplier;
+ return this;
+ }
+
+ public Builder setCloseRunnable(ThrowingRunnable<Exception>
closeRunnable) {
+ this.closeRunnable = closeRunnable;
+ return this;
+ }
+
+ public TestingGenericLeaderElectionDriver build() {
+ return new TestingGenericLeaderElectionDriver(
+ writeLeaderInformationConsumer, hasLeadershipSupplier,
closeRunnable);
+ }
+ }
+}
