Add Google Pubsub extension (JVM only)

Fixes #808

docs/modules/ROOT/pages/list-of-camel-quarkus-extensions.adoc

@@ -18,7 +18,7 @@ In case you are missing some Camel feature in the list:
 == Camel Components
 
 // components: START
-Number of Camel components: 144 in 109 JAR artifacts (0 deprecated)
+Number of Camel components: 145 in 110 JAR artifacts (0 deprecated)
 
 [width="100%",cols="4,1,1,5",options="header"]
 |===
@@ -293,6 +293,10 @@ Level | Since | Description
 `google-mail-stream:index` | Native +
  Stable | 1.0.0-M6 | The google-mail component provides access to Google Mail.
 
+| link:https://camel.apache.org/components/latest/google-pubsub-component.html[Google Pubsub] (camel-quarkus-google-pubsub) +
+`google-pubsub:projectId:destinationName` | JVM +
+ Preview | 1.0.0-M6 | Messaging client for Google Cloud Platform PubSub Service
+
 | link:https://camel.apache.org/components/latest/google-sheets-component.html[Google Sheets] (camel-quarkus-google-sheets) +
 `google-sheets:apiName/methodName` | Native +
  Stable | 1.0.0-M6 | The google-sheets component provides access to Google Sheets.

extensions-jvm/google-pubsub/deployment/pom.xml

@@ -0,0 +1,75 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+    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.
+
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.apache.camel.quarkus</groupId>
+        <artifactId>camel-quarkus-google-pubsub-parent</artifactId>
+        <version>1.1.0-SNAPSHOT</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+
+    <artifactId>camel-quarkus-google-pubsub-deployment</artifactId>
+    <name>Camel Quarkus :: Google Pubsub :: Deployment</name>
+
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>org.apache.camel.quarkus</groupId>
+                <artifactId>camel-quarkus-bom-deployment</artifactId>
+                <version>${project.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.camel.quarkus</groupId>
+            <artifactId>camel-quarkus-core-deployment</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.camel.quarkus</groupId>
+            <artifactId>camel-quarkus-google-pubsub</artifactId>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <annotationProcessorPaths>
+                        <path>
+                            <groupId>io.quarkus</groupId>
+                            <artifactId>quarkus-extension-processor</artifactId>
+                            <version>${quarkus.version}</version>
+                        </path>
+                    </annotationProcessorPaths>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

extensions-jvm/google-pubsub/deployment/src/main/java/org/apache/camel/quarkus/component/google/pubsub/deployment/GooglePubsubProcessor.java

@@ -0,0 +1,46 @@
+/*
+ * 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.camel.quarkus.component.google.pubsub.deployment;
+
+import io.quarkus.deployment.annotations.BuildStep;
+import io.quarkus.deployment.annotations.ExecutionTime;
+import io.quarkus.deployment.annotations.Record;
+import io.quarkus.deployment.builditem.FeatureBuildItem;
+import io.quarkus.deployment.pkg.steps.NativeBuild;
+import org.apache.camel.quarkus.core.JvmOnlyRecorder;
+import org.jboss.logging.Logger;
+
+class GooglePubsubProcessor {
+
+    private static final Logger LOG = Logger.getLogger(GooglePubsubProcessor.class);
+    private static final String FEATURE = "camel-google-pubsub";
+
+    @BuildStep
+    FeatureBuildItem feature() {
+        return new FeatureBuildItem(FEATURE);
+    }
+
+    /**
+     * Remove this once this extension starts supporting the native mode.
+     */
+    @BuildStep(onlyIf = NativeBuild.class)
+    @Record(value = ExecutionTime.RUNTIME_INIT)
+    void warnJvmInNative(JvmOnlyRecorder recorder) {
+        JvmOnlyRecorder.warnJvmInNative(LOG, FEATURE); // warn at build time
+        recorder.warnJvmInNative(FEATURE); // warn at runtime
+    }
+}

extensions-jvm/google-pubsub/integration-test/pom.xml

@@ -0,0 +1,94 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+    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.
+
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.apache.camel.quarkus</groupId>
+        <artifactId>camel-quarkus-google-pubsub-parent</artifactId>
+        <version>1.1.0-SNAPSHOT</version>
+    </parent>
+
+    <artifactId>camel-quarkus-google-pubsub-integration-test</artifactId>
+    <name>Camel Quarkus :: Google Pubsub :: Integration Test</name>
+    <description>Integration tests for Camel Quarkus Google Pubsub extension</description>
+
+    <properties>
+        <!-- mvnd, a.k.a. Maven Daemon: https://github.com/gnodet/mvnd -->
+        <!-- The following rule tells mvnd to build the listed deployment modules before this module. -->
+        <!-- This is important because mvnd builds modules in parallel by default. The deployment modules are not -->
+        <!-- explicit dependencies of this module in the Maven sense, although they are required by the Quarkus Maven plugin. -->
+        <!-- Please update rule whenever you change the dependencies of this module by running -->
+        <!--     mvn process-resources -Pformat    from the root directory -->
+        <mvnd.builder.rule>camel-quarkus-google-pubsub-deployment,camel-quarkus-support-policy-deployment</mvnd.builder.rule>
+    </properties>
+
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>org.apache.camel.quarkus</groupId>
+                <artifactId>camel-quarkus-bom-test</artifactId>
+                <version>${project.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.camel.quarkus</groupId>
+            <artifactId>camel-quarkus-google-pubsub</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.quarkus</groupId>
+            <artifactId>quarkus-resteasy</artifactId>
+        </dependency>
+
+        <!-- test dependencies -->
+        <dependency>
+            <groupId>io.quarkus</groupId>
+            <artifactId>quarkus-junit5</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>io.rest-assured</groupId>
+            <artifactId>rest-assured</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>io.quarkus</groupId>
+                <artifactId>quarkus-maven-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>build</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+</project>

extensions-jvm/google-pubsub/integration-test/src/main/java/org/apache/camel/quarkus/component/google/pubsub/it/GooglePubsubResource.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.camel.quarkus.component.google.pubsub.it;
+
+import javax.enterprise.context.ApplicationScoped;
+import javax.inject.Inject;
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+import javax.ws.rs.Produces;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
+
+import org.apache.camel.CamelContext;
+import org.jboss.logging.Logger;
+
+@Path("/google-pubsub")
+@ApplicationScoped
+public class GooglePubsubResource {
+
+    private static final Logger LOG = Logger.getLogger(GooglePubsubResource.class);
+
+    private static final String COMPONENT_GOOGLE_PUBSUB = "google-pubsub";
+    @Inject
+    CamelContext context;
+
+    @Path("/load/component/google-pubsub")
+    @GET
+    @Produces(MediaType.TEXT_PLAIN)
+    public Response loadComponentGooglePubsub() throws Exception {
+        /* This is an autogenerated test */
+        if (context.getComponent(COMPONENT_GOOGLE_PUBSUB) != null) {
+            return Response.ok().build();
+        }
+        LOG.warnf("Could not load [%s] from the Camel context", COMPONENT_GOOGLE_PUBSUB);
+        return Response.status(500, COMPONENT_GOOGLE_PUBSUB + " could not be loaded from the Camel context").build();
+    }
+}

extensions-jvm/google-pubsub/integration-test/src/test/java/org/apache/camel/quarkus/component/google/pubsub/it/GooglePubsubTest.java

@@ -0,0 +1,33 @@
+/*
+ * 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.camel.quarkus.component.google.pubsub.it;
+
+import io.quarkus.test.junit.QuarkusTest;
+import io.restassured.RestAssured;
+import org.junit.jupiter.api.Test;
+
+@QuarkusTest
+class GooglePubsubTest {
+
+    @Test
+    public void loadComponentGooglePubsub() {
+        RestAssured.get("/google-pubsub/load/component/google-pubsub")
+                .then()
+                .statusCode(200);
+    }
+
+}

extensions-jvm/google-pubsub/pom.xml

@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+    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.
+
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.apache.camel.quarkus</groupId>
+        <artifactId>camel-quarkus-build-parent</artifactId>
+        <version>1.1.0-SNAPSHOT</version>
+        <relativePath>../../poms/build-parent/pom.xml</relativePath>
+    </parent>
+
+    <artifactId>camel-quarkus-google-pubsub-parent</artifactId>
+    <name>Camel Quarkus :: Google Pubsub</name>
+    <packaging>pom</packaging>
+
+    <modules>
+        <module>deployment</module>
+        <module>runtime</module>
+        <module>integration-test</module>
+    </modules>
+</project>