Move spring-integration-hazelcast from extensions

* Update javadocs
* Upgrade from log4j to log4j2
* Remove unnecessary test deps.
* Change from implmementation to api
* Remove unneeded test deps.
* Fix HZ XSD to be "versionless"
* Use `com.google.code.findbugs:annotations` dep to avoid warning from HZ code base

Author: Robert Höglund

build.gradle

@@ -59,8 +59,8 @@ ext {
     commonsNetVersion = '3.8.0'
     curatorVersion = '4.3.0'
     derbyVersion = '10.14.2.0'
+    findbugsVersion = '3.0.1'
     ftpServerVersion = '1.2.0'
-    googleJsr305Version = '3.0.2'
     greenmailVersion = '2.0.0-alpha-2'
     groovyVersion = '3.0.10'
     hamcrestVersion = '2.2'
@@ -251,8 +251,8 @@ configure(javaProjects) { subproject ->
         }
 
         // JSR-305 only used for non-required meta-annotations
-        compileOnly "com.google.code.findbugs:jsr305:$googleJsr305Version"
-        testImplementation "com.google.code.findbugs:jsr305:$googleJsr305Version"
+        compileOnly "com.google.code.findbugs:annotations:$findbugsVersion"
+        testImplementation "com.google.code.findbugs:annotations:$findbugsVersion"
         testImplementation("org.awaitility:awaitility:$awaitilityVersion") {
             exclude group: 'org.hamcrest'
         }
@@ -1080,6 +1080,15 @@ project('spring-integration-bom') {
     }
 }
 
+
+project('spring-integration-hazelcast') {
+    description = 'Spring Integration Hazelcast Support'
+    dependencies {
+	api "com.hazelcast:hazelcast:$hazelcastVersion"
+	api project(':spring-integration-core')
+	}
+}
+
 sonarqube {
     properties {
         property 'sonar.links.homepage', linkHomepage

spring-integration-hazelcast/src/main/java/org/springframework/integration/hazelcast/CacheEventType.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright 2015-2022 the original author or authors.
+ *
+ * Licensed 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
+ *
+ *      https://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.springframework.integration.hazelcast;
+
+/**
+ * Enumeration of Cache Event Types.
+ *
+ * @author Eren Avsarogullari
+ * @author Artem Bilan
+ *
+ * @since 6.0
+ *
+ * @see org.springframework.integration.hazelcast.inbound.AbstractHazelcastMessageProducer
+ */
+public enum CacheEventType {
+
+	/**
+	 * The Hazelcast ADDED event.
+	 */
+	ADDED,
+
+	/**
+	 * The Hazelcast REMOVED event.
+	 */
+	REMOVED,
+
+	/**
+	 * The Hazelcast UPDATED event.
+	 */
+	UPDATED,
+
+	/**
+	 * The Hazelcast EVICTED event.
+	 */
+	EVICTED,
+
+	/**
+	 * The Hazelcast EXPIRED event.
+	 */
+	EXPIRED,
+
+	/**
+	 * The Hazelcast EVICT_ALL event.
+	 */
+	EVICT_ALL,
+
+	/**
+	 * The Hazelcast CLEAR_ALL event.
+	 */
+	CLEAR_ALL
+
+}

spring-integration-hazelcast/src/main/java/org/springframework/integration/hazelcast/CacheListeningPolicyType.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2015-2022 the original author or authors.
+ *
+ * Licensed 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
+ *
+ *      https://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.springframework.integration.hazelcast;
+
+/**
+ * Enumeration of Cache Listening Policy Type.
+ *
+ * @author Eren Avsarogullari
+ * @author Artem Bilan
+ *
+ * @since 6.0
+ *
+ * @see org.springframework.integration.hazelcast.inbound.AbstractHazelcastMessageProducer
+ */
+public enum CacheListeningPolicyType {
+
+	/**
+	 * Only the local Hazelcast node can accept event.
+	 */
+	SINGLE,
+
+	/**
+	 * All subscribed members can accept event.
+	 */
+	ALL
+
+}

spring-integration-hazelcast/src/main/java/org/springframework/integration/hazelcast/ClusterMonitorType.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright 2015-2022 the original author or authors.
+ *
+ * Licensed 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
+ *
+ *      https://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.springframework.integration.hazelcast;
+
+/**
+ * Enumeration of Hazelcast Cluster Monitor Types.
+ *
+ * @author Eren Avsarogullari
+ * @author Artem Bilan
+ *
+ * @since 6.0
+ *
+ * @see org.springframework.integration.hazelcast.inbound.HazelcastClusterMonitorMessageProducer
+ * @see com.hazelcast.core.DistributedObjectListener
+ * @see com.hazelcast.core.LifecycleListener
+ */
+public enum ClusterMonitorType {
+
+	/**
+	 * The membership listener mode.
+	 */
+	MEMBERSHIP,
+
+	/**
+	 * The distributed object listener mode.
+	 */
+	DISTRIBUTED_OBJECT,
+
+	/**
+	 * The migration listener mode.
+	 */
+	MIGRATION,
+
+	/**
+	 * The listener listener mode.
+	 */
+	LIFECYCLE,
+
+	/**
+	 * The client listener mode.
+	 */
+	CLIENT
+
+}

spring-integration-hazelcast/src/main/java/org/springframework/integration/hazelcast/DistributedSQLIterationType.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2015-2022 the original author or authors.
+ *
+ * Licensed 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
+ *
+ *      https://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.springframework.integration.hazelcast;
+
+/**
+ * Enumeration of Distributed SQL Iteration Type.
+ *
+ * @author Eren Avsarogullari
+ * @author Artem Bilan
+ *
+ * @since 6.0
+ *
+ * @see org.springframework.integration.hazelcast.inbound.HazelcastDistributedSQLMessageSource
+ * @see com.hazelcast.map.IMap
+ */
+public enum DistributedSQLIterationType {
+
+	/**
+	 * The {@link com.hazelcast.map.IMap#entrySet()} to iterate.
+	 */
+	ENTRY,
+
+	/**
+	 * The {@link com.hazelcast.map.IMap#keySet()} to iterate.
+	 */
+	KEY,
+
+	/**
+	 * The {@link com.hazelcast.map.IMap#localKeySet()} to iterate.
+	 */
+	LOCAL_KEY,
+
+	/**
+	 * The {@link com.hazelcast.map.IMap#values()} to iterate.
+	 */
+	VALUE
+
+}

spring-integration-hazelcast/src/main/java/org/springframework/integration/hazelcast/HazelcastHeaders.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright 2015-2022 the original author or authors.
+ *
+ * Licensed 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
+ *
+ *      https://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.springframework.integration.hazelcast;
+
+/**
+ * Hazelcast Message Headers.
+ *
+ * @author Eren Avsarogullari
+ * @author Artem Bilan
+ *
+ * @since 6.0
+ */
+public abstract class HazelcastHeaders {
+
+	private static final String PREFIX = "hazelcast_";
+
+	/**
+	 * The event type header name.
+	 */
+	public static final String EVENT_TYPE = PREFIX + "eventType";
+
+	/**
+	 * The member header name.
+	 */
+	public static final String MEMBER = PREFIX + "member";
+
+	/**
+	 * The cache name header name.
+	 */
+	public static final String CACHE_NAME = PREFIX + "cacheName";
+
+	/**
+	 * The publishing time header name.
+	 */
+	public static final String PUBLISHING_TIME = PREFIX + "publishingTime";
+
+}