Revert "Cherrypick #15418 and #15515"

Author: udim

buildSrc/src/main/groovy/org/apache/beam/gradle/BeamModulePlugin.groovy

@@ -446,7 +446,7 @@ class BeamModulePlugin implements Plugin<Project> {
     def errorprone_version = "2.3.4"
     def google_clients_version = "1.31.0"
     def google_cloud_bigdataoss_version = "2.2.2"
-    def google_cloud_pubsublite_version = "1.0.4"
+    def google_cloud_pubsublite_version = "0.13.2"
     def google_code_gson_version = "2.8.6"
     def google_oauth_clients_version = "1.31.0"
     // Try to keep grpc_version consistent with gRPC version in google_cloud_platform_libraries_bom

sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/pubsub/PubsubMessages.java

@@ -24,36 +24,25 @@
 import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.collect.ImmutableMap;
 
 /** Common util functions for converting between PubsubMessage proto and {@link PubsubMessage}. */
-public final class PubsubMessages {
-  private PubsubMessages() {}
-
-  public static com.google.pubsub.v1.PubsubMessage toProto(PubsubMessage input) {
-    Map<String, String> attributes = input.getAttributeMap();
-    com.google.pubsub.v1.PubsubMessage.Builder message =
-        com.google.pubsub.v1.PubsubMessage.newBuilder()
-            .setData(ByteString.copyFrom(input.getPayload()));
-    // TODO(BEAM-8085) this should not be null
-    if (attributes != null) {
-      message.putAllAttributes(attributes);
-    }
-    String messageId = input.getMessageId();
-    if (messageId != null) {
-      message.setMessageId(messageId);
-    }
-    return message.build();
-  }
-
-  public static PubsubMessage fromProto(com.google.pubsub.v1.PubsubMessage input) {
-    return new PubsubMessage(
-        input.getData().toByteArray(), input.getAttributesMap(), input.getMessageId());
-  }
-
+public class PubsubMessages {
   // Convert the PubsubMessage to a PubsubMessage proto, then return its serialized representation.
   public static class ParsePayloadAsPubsubMessageProto
       implements SerializableFunction<PubsubMessage, byte[]> {
     @Override
     public byte[] apply(PubsubMessage input) {
-      return toProto(input).toByteArray();
+      Map<String, String> attributes = input.getAttributeMap();
+      com.google.pubsub.v1.PubsubMessage.Builder message =
+          com.google.pubsub.v1.PubsubMessage.newBuilder()
+              .setData(ByteString.copyFrom(input.getPayload()));
+      // TODO(BEAM-8085) this should not be null
+      if (attributes != null) {
+        message.putAllAttributes(attributes);
+      }
+      String messageId = input.getMessageId();
+      if (messageId != null) {
+        message.setMessageId(messageId);
+      }
+      return message.build().toByteArray();
     }
   }
 
@@ -65,7 +54,8 @@ public PubsubMessage apply(byte[] input) {
       try {
         com.google.pubsub.v1.PubsubMessage message =
             com.google.pubsub.v1.PubsubMessage.parseFrom(input);
-        return fromProto(message);
+        return new PubsubMessage(
+            message.getData().toByteArray(), message.getAttributesMap(), message.getMessageId());
       } catch (InvalidProtocolBufferException e) {
         throw new RuntimeException("Could not decode Pubsub message", e);
       }

sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/pubsublite/CloudPubsubChecks.java

@@ -0,0 +1,51 @@
+/*
+ * 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.beam.sdk.io.gcp.pubsublite;
+
+import static com.google.cloud.pubsublite.cloudpubsub.MessageTransforms.toCpsPublishTransformer;
+
+import com.google.cloud.pubsublite.Message;
+import com.google.cloud.pubsublite.proto.PubSubMessage;
+import org.apache.beam.sdk.transforms.MapElements;
+import org.apache.beam.sdk.transforms.PTransform;
+import org.apache.beam.sdk.values.PCollection;
+import org.apache.beam.sdk.values.TypeDescriptor;
+
+/**
+ * A class providing a conversion validity check between Cloud Pub/Sub and Pub/Sub Lite message
+ * types.
+ */
+public final class CloudPubsubChecks {
+  private CloudPubsubChecks() {}
+
+  /**
+   * Ensure that all messages that pass through can be converted to Cloud Pub/Sub messages using the
+   * standard transformation methods in the client library.
+   *
+   * <p>Will fail the pipeline if a message has multiple attributes per key.
+   */
+  public static PTransform<PCollection<? extends PubSubMessage>, PCollection<PubSubMessage>>
+      ensureUsableAsCloudPubsub() {
+    return MapElements.into(TypeDescriptor.of(PubSubMessage.class))
+        .via(
+            message -> {
+              Object unused = toCpsPublishTransformer().transform(Message.fromProto(message));
+              return message;
+            });
+  }
+}