[Fix #473] Refactor project structure

Author: fjtirado

api/pom.xml

@@ -121,77 +121,6 @@
                     </execution>
                 </executions>
             </plugin>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-checkstyle-plugin</artifactId>
-                <configuration>
-                    <checkstyleRules>
-                        <module name="Checker">
-                            <module name="RegexpHeader">
-                                <property name="header" value="${checkstyle.header.template}" />
-                                <property name="fileExtensions" value="${checkstyle.header.extensions}" />
-                            </module>
-                            <module name="TreeWalker">
-                                <module name="RegexpSinglelineJava">
-                                    <property name="format" value="@author" />
-                                    <property name="message" value="No @author tag allowed" />
-                                </module>
-                            </module>
-                        </module>
-                    </checkstyleRules>
-                    <outputFile>${project.build.directory}/checkstyle.log</outputFile>
-                    <includeTestSourceDirectory>true</includeTestSourceDirectory>
-                    <includeResources>true</includeResources>
-                    <includeTestResources>true</includeTestResources>
-                    <consoleOutput>false</consoleOutput>
-                    <failsOnError>false</failsOnError>
-                    <logViolationsToConsole>${checkstyle.logViolationsToConsole}</logViolationsToConsole>
-                    <failOnViolation>${checkstyle.failOnViolation}</failOnViolation>
-                    <sourceDirectories>
-                        <sourceDirectory>${project.build.sourceDirectory}</sourceDirectory>
-                        <sourceDirectory>${project.build.testSourceDirectory}</sourceDirectory>
-                    </sourceDirectories>
-                </configuration>
-                <executions>
-                    <execution>
-                        <phase>compile</phase>
-                        <goals>
-                            <goal>check</goal>
-                        </goals>
-                    </execution>
-                </executions>
-            </plugin>
-            <plugin>
-                <groupId>com.spotify.fmt</groupId>
-                <artifactId>fmt-maven-plugin</artifactId>
-                <configuration>
-                    <sourceDirectory>src/main/java</sourceDirectory>
-                    <testSourceDirectory>src/test/java</testSourceDirectory>
-                    <verbose>false</verbose>
-                    <filesNamePattern>.*\.java</filesNamePattern>
-                    <skip>false</skip>
-                    <skipSortingImports>false</skipSortingImports>
-                    <style>google</style>
-                </configuration>
-                <executions>
-                    <execution>
-                        <goals>
-                            <goal>format</goal>
-                        </goals>
-                    </execution>
-                </executions>
-            </plugin>
-            <plugin>
-               <groupId>org.apache.maven.plugins</groupId>
-               <artifactId>maven-jar-plugin</artifactId>
-               <executions>
-                   <execution>
-                       <goals>
-                           <goal>test-jar</goal>
-                       </goals>
-                   </execution>
-               </executions>
-           </plugin>
         </plugins>
     </build>
 </project>

impl/bom/pom.xml

@@ -0,0 +1,20 @@
+<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <groupId>io.serverlessworkflow</groupId>
+    <artifactId>serverlessworkflow-impl</artifactId>
+    <version>7.0.0-SNAPSHOT</version>
+  </parent>
+  <artifactId>serverlessworkflow-impl-bom</artifactId>
+  <packaging>pom</packaging>
+  <dependencies>
+    <dependency>
+      <groupId>io.serverlessworkflow</groupId>
+      <artifactId>serverlessworkflow-impl-core</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>io.serverlessworkflow</groupId>
+      <artifactId>serverlessworkflow-impl-http</artifactId>
+    </dependency>
+  </dependencies>
+</project>

impl/core/.checkstyle

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<fileset-config file-format-version="1.2.0" simple-config="false" sync-formatter="false">
+  <local-check-config name="maven-checkstyle-plugin default" location="file:/home/ftirados/kogito_new/.metadata/.plugins/com.basistech.m2e.code.quality.checkstyle/serverlessworkflow-impl-core_inline_checkstyle.xml" type="remote" description="maven-checkstyle-plugin configuration default">
+    <property name="checkstyle.header.file" value="/home/ftirados/kogito_new/.metadata/.plugins/org.eclipse.core.resources/.projects/serverlessworkflow-impl-core/com.basistech.m2e.code.quality.checkstyleConfigurator/checkstyle-header-default.txt"/>
+    <property name="checkstyle.cache.file" value="${project_loc}/target/checkstyle-cachefile"/>
+  </local-check-config>
+  <fileset name="java-sources-default" enabled="true" check-config-name="maven-checkstyle-plugin default" local="true">
+    <file-match-pattern match-pattern="^src/test/java/.*\/.*\.java" include-pattern="true"/>
+    <file-match-pattern match-pattern="^src/main/java/.*\/.*\.java" include-pattern="true"/>
+    <file-match-pattern match-pattern="^src/main/resources/.*\.properties" include-pattern="true"/>
+    <file-match-pattern match-pattern="^src/test/resources/.*\.properties" include-pattern="true"/>
+  </fileset>
+</fileset-config>

impl/core/pom.xml

@@ -0,0 +1,48 @@
+<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <groupId>io.serverlessworkflow</groupId>
+    <artifactId>serverlessworkflow-impl</artifactId>
+    <version>7.0.0-SNAPSHOT</version>
+  </parent>
+  <artifactId>serverlessworkflow-impl-core</artifactId>
+  <properties>
+      <version.net.thisptr>1.1.0</version.net.thisptr>
+  </properties>
+  <dependencies>
+    <dependency>
+      <groupId>io.serverlessworkflow</groupId>
+      <artifactId>serverlessworkflow-api</artifactId>
+      <version>7.0.0-SNAPSHOT</version>
+    </dependency>
+    <dependency>
+     <groupId>com.networknt</groupId>
+     <artifactId>json-schema-validator</artifactId>
+   </dependency>
+    <dependency>
+      <groupId>net.thisptr</groupId>
+      <artifactId>jackson-jq</artifactId>
+      <version>${version.net.thisptr}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-api</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-engine</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-params</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.assertj</groupId>
+      <artifactId>assertj-core</artifactId>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+</project>

impl/src/main/java/io/serverlessworkflow/impl/DefaultWorkflowPosition.java renamed to impl/core/src/main/java/io/serverlessworkflow/impl/DefaultWorkflowPosition.java

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2020-Present The Serverless Workflow Specification 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
+ *
+ * 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 io.serverlessworkflow.impl;
+
+public enum WorkflowState {
+  STARTED,
+  WAITING,
+  COMPLETED
+}

impl/src/main/java/io/serverlessworkflow/impl/TaskContext.java renamed to impl/core/src/main/java/io/serverlessworkflow/impl/TaskContext.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2020-Present The Serverless Workflow Specification 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
+ *
+ * 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 io.serverlessworkflow.impl.executors;
+
+import io.serverlessworkflow.api.types.TaskBase;
+import io.serverlessworkflow.impl.TaskContext;
+import io.serverlessworkflow.impl.WorkflowContext;
+import io.serverlessworkflow.impl.WorkflowDefinition;
+
+public class CallTaskExecutor<T extends TaskBase> extends AbstractTaskExecutor<T> {
+
+  private final CallableTask<T> callable;
+
+  protected CallTaskExecutor(T task, WorkflowDefinition definition, CallableTask<T> callable) {
+    super(task, definition);
+    this.callable = callable;
+    callable.init(task, definition);
+  }
+
+  @Override
+  protected void internalExecute(WorkflowContext workflow, TaskContext<T> taskContext) {
+    taskContext.rawOutput(callable.apply(workflow, taskContext, taskContext.input()));
+  }
+}

impl/src/main/java/io/serverlessworkflow/impl/WorkflowApplication.java renamed to impl/core/src/main/java/io/serverlessworkflow/impl/WorkflowApplication.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2020-Present The Serverless Workflow Specification 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
+ *
+ * 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 io.serverlessworkflow.impl.executors;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import io.serverlessworkflow.api.types.TaskBase;
+import io.serverlessworkflow.impl.TaskContext;
+import io.serverlessworkflow.impl.WorkflowContext;
+import io.serverlessworkflow.impl.WorkflowDefinition;
+
+public interface CallableTask<T extends TaskBase> {
+  void init(T task, WorkflowDefinition definition);
+
+  JsonNode apply(WorkflowContext workflowContext, TaskContext<T> taskContext, JsonNode input);
+
+  boolean accept(Class<? extends TaskBase> clazz);
+}

impl/src/main/java/io/serverlessworkflow/impl/WorkflowContext.java renamed to impl/core/src/main/java/io/serverlessworkflow/impl/WorkflowContext.java

@@ -15,10 +15,13 @@
  */
 package io.serverlessworkflow.impl.executors;
 
+import io.serverlessworkflow.api.types.CallHTTP;
 import io.serverlessworkflow.api.types.CallTask;
 import io.serverlessworkflow.api.types.Task;
 import io.serverlessworkflow.api.types.TaskBase;
 import io.serverlessworkflow.impl.WorkflowDefinition;
+import java.util.ServiceLoader;
+import java.util.ServiceLoader.Provider;
 
 public class DefaultTaskExecutorFactory implements TaskExecutorFactory {
 
@@ -30,12 +33,15 @@ public static TaskExecutorFactory get() {
 
   protected DefaultTaskExecutorFactory() {}
 
+  private ServiceLoader<CallableTask> callTasks = ServiceLoader.load(CallableTask.class);
+
   public TaskExecutor<? extends TaskBase> getTaskExecutor(
       Task task, WorkflowDefinition definition) {
     if (task.getCallTask() != null) {
       CallTask callTask = task.getCallTask();
       if (callTask.getCallHTTP() != null) {
-        return new HttpExecutor(callTask.getCallHTTP(), definition);
+        return new CallTaskExecutor<>(
+            callTask.getCallHTTP(), definition, findCallTask(CallHTTP.class));
       }
     } else if (task.getSwitchTask() != null) {
       return new SwitchExecutor(task.getSwitchTask(), definition);
@@ -46,4 +52,15 @@ public TaskExecutor<? extends TaskBase> getTaskExecutor(
     }
     throw new UnsupportedOperationException(task.get().getClass().getName() + " not supported yet");
   }
+
+  @SuppressWarnings("unchecked")
+  private <T extends TaskBase> CallableTask<T> findCallTask(Class<T> clazz) {
+    return (CallableTask<T>)
+        callTasks.stream()
+            .map(Provider::get)
+            .filter(s -> s.accept(clazz))
+            .findAny()
+            .orElseThrow(
+                () -> new UnsupportedOperationException(clazz.getName() + " not supported yet"));
+  }
 }

impl/src/main/java/io/serverlessworkflow/impl/WorkflowDefinition.java renamed to impl/core/src/main/java/io/serverlessworkflow/impl/WorkflowDefinition.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2020-Present The Serverless Workflow Specification 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
+ *
+ * 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 io.serverlessworkflow.impl.executors;
 
 import io.serverlessworkflow.api.types.FlowDirective;

impl/src/main/java/io/serverlessworkflow/impl/WorkflowExecutionListener.java renamed to impl/core/src/main/java/io/serverlessworkflow/impl/WorkflowExecutionListener.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2020-Present The Serverless Workflow Specification 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
+ *
+ * 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 io.serverlessworkflow.impl.expressions;
+
+public class ExpressionValidationException extends RuntimeException {
+
+  private static final long serialVersionUID = 1L;
+
+  public ExpressionValidationException(String message) {
+    super(message);
+  }
+
+  public ExpressionValidationException(String message, Throwable ex) {
+    super(message, ex);
+  }
+}

impl/src/main/java/io/serverlessworkflow/impl/WorkflowFilter.java renamed to impl/core/src/main/java/io/serverlessworkflow/impl/WorkflowFilter.java

@@ -1,20 +1,17 @@
 /*
- * 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
+ * Copyright 2020-Present The Serverless Workflow Specification Authors
  *
- *   http://www.apache.org/licenses/LICENSE-2.0
+ * 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
  *
- * 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.
+ * 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 io.serverlessworkflow.impl.jsonschema;