[INLONG-10358][Sort] Make pulsar source support report audit informat…

…ion exactly once (#10511)

inlong-sort/sort-flink/sort-flink-v1.15/sort-connectors/pulsar/src/main/java/org/apache/inlong/sort/pulsar/source/PulsarSource.java

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+/*
+ * 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.inlong.sort.pulsar.source;
+
+import org.apache.flink.annotation.Internal;
+import org.apache.flink.annotation.PublicEvolving;
+import org.apache.flink.api.common.typeinfo.TypeInformation;
+import org.apache.flink.api.connector.source.Boundedness;
+import org.apache.flink.api.connector.source.Source;
+import org.apache.flink.api.connector.source.SourceReader;
+import org.apache.flink.api.connector.source.SourceReaderContext;
+import org.apache.flink.api.connector.source.SplitEnumerator;
+import org.apache.flink.api.connector.source.SplitEnumeratorContext;
+import org.apache.flink.api.java.typeutils.ResultTypeQueryable;
+import org.apache.flink.connector.pulsar.source.config.SourceConfiguration;
+import org.apache.flink.connector.pulsar.source.enumerator.PulsarSourceEnumState;
+import org.apache.flink.connector.pulsar.source.enumerator.PulsarSourceEnumStateSerializer;
+import org.apache.flink.connector.pulsar.source.enumerator.PulsarSourceEnumerator;
+import org.apache.flink.connector.pulsar.source.enumerator.cursor.StartCursor;
+import org.apache.flink.connector.pulsar.source.enumerator.cursor.StopCursor;
+import org.apache.flink.connector.pulsar.source.enumerator.subscriber.PulsarSubscriber;
+import org.apache.flink.connector.pulsar.source.enumerator.topic.range.RangeGenerator;
+import org.apache.flink.connector.pulsar.source.reader.deserializer.PulsarDeserializationSchema;
+import org.apache.flink.connector.pulsar.source.reader.deserializer.PulsarDeserializationSchemaInitializationContext;
+import org.apache.flink.connector.pulsar.source.split.PulsarPartitionSplit;
+import org.apache.flink.connector.pulsar.source.split.PulsarPartitionSplitSerializer;
+import org.apache.flink.core.io.SimpleVersionedSerializer;
+
+/**
+ * The Source implementation of Pulsar. Please use a {@link PulsarSourceBuilder} to construct a
+ * {@link PulsarSource}. The following example shows how to create a PulsarSource emitting records
+ * of <code>String</code> type.
+ *
+ * <pre>{@code
+ * PulsarSource<String> source = PulsarSource
+ *     .builder()
+ *     .setTopics(TOPIC1， TOPIC2)
+ *     .setServiceUrl(getServiceUrl())
+ *     .setAdminUrl(getAdminUrl())
+ *     .setSubscriptionName("test")
+ *     .setDeserializationSchema(PulsarDeserializationSchema.flinkSchema(new SimpleStringSchema()))
+ *     .setBounded(StopCursor::defaultStopCursor)
+ *     .build();
+ * }</pre>
+ *
+ * <p>See {@link PulsarSourceBuilder} for more details.
+ *
+ * @param <OUT> The output type of the source.
+ * copy from {@link org.apache.flink.connector.pulsar.source.PulsarSource}
+ * not modified
+ */
+@PublicEvolving
+public final class PulsarSource<OUT>
+        implements
+            Source<OUT, PulsarPartitionSplit, PulsarSourceEnumState>,
+            ResultTypeQueryable<OUT> {
+
+    private static final long serialVersionUID = 7773108631275567433L;
+
+    /**
+     * The configuration for pulsar source, we don't support the pulsar's configuration class
+     * directly.
+     */
+    private final SourceConfiguration sourceConfiguration;
+
+    private final PulsarSubscriber subscriber;
+
+    private final RangeGenerator rangeGenerator;
+
+    private final StartCursor startCursor;
+
+    private final StopCursor stopCursor;
+
+    private final Boundedness boundedness;
+
+    /** The pulsar deserialization schema used for deserializing message. */
+    private final PulsarDeserializationSchema<OUT> deserializationSchema;
+
+    /**
+     * The constructor for PulsarSource, it's package protected for forcing using {@link
+     * PulsarSourceBuilder}.
+     */
+    PulsarSource(
+            SourceConfiguration sourceConfiguration,
+            PulsarSubscriber subscriber,
+            RangeGenerator rangeGenerator,
+            StartCursor startCursor,
+            StopCursor stopCursor,
+            Boundedness boundedness,
+            PulsarDeserializationSchema<OUT> deserializationSchema) {
+        this.sourceConfiguration = sourceConfiguration;
+        this.subscriber = subscriber;
+        this.rangeGenerator = rangeGenerator;
+        this.startCursor = startCursor;
+        this.stopCursor = stopCursor;
+        this.boundedness = boundedness;
+        this.deserializationSchema = deserializationSchema;
+    }
+
+    /**
+     * Get a PulsarSourceBuilder to builder a {@link PulsarSource}.
+     *
+     * @return a Pulsar source builder.
+     */
+    public static <OUT> PulsarSourceBuilder<OUT> builder() {
+        return new PulsarSourceBuilder<>();
+    }
+
+    @Override
+    public Boundedness getBoundedness() {
+        return boundedness;
+    }
+
+    @Internal
+    @Override
+    public SourceReader<OUT, PulsarPartitionSplit> createReader(SourceReaderContext readerContext)
+            throws Exception {
+        // Initialize the deserialization schema before creating the pulsar reader.
+        PulsarDeserializationSchemaInitializationContext initializationContext =
+                new PulsarDeserializationSchemaInitializationContext(readerContext);
+        deserializationSchema.open(initializationContext, sourceConfiguration);
+
+        return PulsarSourceReaderFactory.create(
+                readerContext, deserializationSchema, sourceConfiguration);
+    }
+
+    @Internal
+    @Override
+    public SplitEnumerator<PulsarPartitionSplit, PulsarSourceEnumState> createEnumerator(
+            SplitEnumeratorContext<PulsarPartitionSplit> enumContext) {
+        return new PulsarSourceEnumerator(
+                subscriber,
+                startCursor,
+                stopCursor,
+                rangeGenerator,
+                sourceConfiguration,
+                enumContext);
+    }
+
+    @Internal
+    @Override
+    public SplitEnumerator<PulsarPartitionSplit, PulsarSourceEnumState> restoreEnumerator(
+            SplitEnumeratorContext<PulsarPartitionSplit> enumContext,
+            PulsarSourceEnumState checkpoint) {
+        return new PulsarSourceEnumerator(
+                subscriber,
+                startCursor,
+                stopCursor,
+                rangeGenerator,
+                sourceConfiguration,
+                enumContext,
+                checkpoint);
+    }
+
+    @Internal
+    @Override
+    public SimpleVersionedSerializer<PulsarPartitionSplit> getSplitSerializer() {
+        return PulsarPartitionSplitSerializer.INSTANCE;
+    }
+
+    @Internal
+    @Override
+    public SimpleVersionedSerializer<PulsarSourceEnumState> getEnumeratorCheckpointSerializer() {
+        return PulsarSourceEnumStateSerializer.INSTANCE;
+    }
+
+    @Override
+    public TypeInformation<OUT> getProducedType() {
+        return deserializationSchema.getProducedType();
+    }
+}