[Fix #466] Implement switch

Signed-off-by: Francisco Javier Tirado Sarti <ftirados@redhat.com>

.github/workflows/maven-verify.yml

@@ -16,11 +16,11 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
-      - name: Set up JDK 11
+      - name: Set up JDK 17
         uses: actions/setup-java@v3
         with:
           distribution: temurin
-          java-version: 11
+          java-version: 17
           cache: 'maven'
 
       - name: Verify with Maven

.github/workflows/release.yml

@@ -29,11 +29,11 @@ jobs:
           gpg_private_key: ${{ secrets.GPG_PRIVATE_KEY }}
           passphrase: ${{ secrets.GPG_PASSPHRASE }}
 
-      - name: Set up JDK 11
+      - name: Set up JDK 17
         uses: actions/setup-java@v3
         with:
           distribution: temurin
-          java-version: 11
+          java-version: 17
           cache: 'maven'
           server-id: ossrh
           server-username: MAVEN_USERNAME
@@ -57,4 +57,4 @@ jobs:
           MAVEN_PASSWORD: ${{ secrets.OSSRH_PASSWORD }}
 
       - name: Push tags
-        run: git push && git push --tags
+        run: git push && git push --tags

impl/src/main/java/io/serverlessworkflow/impl/TaskContext.java

@@ -16,6 +16,8 @@
 package io.serverlessworkflow.impl;
 
 import com.fasterxml.jackson.databind.JsonNode;
+import io.serverlessworkflow.api.types.FlowDirective;
+import io.serverlessworkflow.api.types.FlowDirectiveEnum;
 import io.serverlessworkflow.api.types.TaskBase;
 
 public class TaskContext<T extends TaskBase> {
@@ -26,11 +28,15 @@ public class TaskContext<T extends TaskBase> {
   private JsonNode input;
   private JsonNode output;
   private JsonNode rawOutput;
+  private FlowDirective flowDirective;
 
   public TaskContext(JsonNode rawInput, T task) {
     this.rawInput = rawInput;
     this.input = rawInput;
+    this.rawOutput = rawInput;
+    this.output = rawInput;
     this.task = task;
+    this.flowDirective = task.getThen();
   }
 
   public void input(JsonNode input) {
@@ -54,6 +60,10 @@ public void rawOutput(JsonNode output) {
     this.output = output;
   }
 
+  public JsonNode rawOutput() {
+    return rawOutput;
+  }
+
   public void output(JsonNode output) {
     this.output = output;
   }
@@ -62,7 +72,13 @@ public JsonNode output() {
     return output;
   }
 
-  public JsonNode rawOutput() {
-    return rawOutput;
+  public void flowDirective(FlowDirective flowDirective) {
+    this.flowDirective = flowDirective;
+  }
+
+  public FlowDirective flowDirective() {
+    return flowDirective == null
+        ? new FlowDirective().withFlowDirectiveEnum(FlowDirectiveEnum.CONTINUE)
+        : flowDirective;
   }
 }

impl/src/main/java/io/serverlessworkflow/impl/WorkflowApplication.java

@@ -0,0 +1,148 @@
+/*
+ * 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;
+
+import io.serverlessworkflow.api.types.Document;
+import io.serverlessworkflow.api.types.Workflow;
+import io.serverlessworkflow.impl.executors.DefaultTaskExecutorFactory;
+import io.serverlessworkflow.impl.executors.TaskExecutorFactory;
+import io.serverlessworkflow.impl.expressions.ExpressionFactory;
+import io.serverlessworkflow.impl.expressions.JQExpressionFactory;
+import io.serverlessworkflow.impl.jsonschema.DefaultSchemaValidatorFactory;
+import io.serverlessworkflow.impl.jsonschema.SchemaValidatorFactory;
+import io.serverlessworkflow.resources.DefaultResourceLoaderFactory;
+import io.serverlessworkflow.resources.ResourceLoaderFactory;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+public class WorkflowApplication implements AutoCloseable {
+
+  private final TaskExecutorFactory taskFactory;
+  private final ExpressionFactory exprFactory;
+  private final ResourceLoaderFactory resourceLoaderFactory;
+  private final SchemaValidatorFactory schemaValidatorFactory;
+  private final Collection<WorkflowExecutionListener> listeners;
+  private final Map<WorkflowId, WorkflowDefinition> definitions;
+
+  public WorkflowApplication(
+      TaskExecutorFactory taskFactory,
+      ExpressionFactory exprFactory,
+      ResourceLoaderFactory resourceLoaderFactory,
+      SchemaValidatorFactory schemaValidatorFactory,
+      Collection<WorkflowExecutionListener> listeners) {
+    this.taskFactory = taskFactory;
+    this.exprFactory = exprFactory;
+    this.resourceLoaderFactory = resourceLoaderFactory;
+    this.schemaValidatorFactory = schemaValidatorFactory;
+    this.listeners = listeners;
+    this.definitions = new ConcurrentHashMap<>();
+  }
+
+  public TaskExecutorFactory taskFactory() {
+    return taskFactory;
+  }
+
+  public static Builder builder() {
+    return new Builder();
+  }
+
+  public ExpressionFactory expressionFactory() {
+    return exprFactory;
+  }
+
+  public SchemaValidatorFactory validatorFactory() {
+    return schemaValidatorFactory;
+  }
+
+  public ResourceLoaderFactory resourceLoaderFactory() {
+    return resourceLoaderFactory;
+  }
+
+  public Collection<WorkflowExecutionListener> listeners() {
+    return listeners;
+  }
+
+  public static class Builder {
+    private TaskExecutorFactory taskFactory = DefaultTaskExecutorFactory.get();
+    private ExpressionFactory exprFactory = JQExpressionFactory.get();
+    private Collection<WorkflowExecutionListener> listeners;
+    private ResourceLoaderFactory resourceLoaderFactory = DefaultResourceLoaderFactory.get();
+    private SchemaValidatorFactory schemaValidatorFactory = DefaultSchemaValidatorFactory.get();
+
+    private Builder() {}
+
+    public Builder withListener(WorkflowExecutionListener listener) {
+      if (listeners == null) {
+        listeners = new HashSet<>();
+      }
+      listeners.add(listener);
+      return this;
+    }
+
+    public Builder withTaskExecutorFactory(TaskExecutorFactory factory) {
+      this.taskFactory = factory;
+      return this;
+    }
+
+    public Builder withExpressionFactory(ExpressionFactory factory) {
+      this.exprFactory = factory;
+      return this;
+    }
+
+    public Builder withResourceLoaderFactory(ResourceLoaderFactory resourceLoader) {
+      this.resourceLoaderFactory = resourceLoader;
+      return this;
+    }
+
+    public Builder withSchemaValidatorFactory(SchemaValidatorFactory factory) {
+      this.schemaValidatorFactory = factory;
+      return this;
+    }
+
+    public WorkflowApplication build() {
+      return new WorkflowApplication(
+          taskFactory,
+          exprFactory,
+          resourceLoaderFactory,
+          schemaValidatorFactory,
+          listeners == null
+              ? Collections.emptySet()
+              : Collections.unmodifiableCollection(listeners));
+    }
+  }
+
+  private static record WorkflowId(String namespace, String name, String version) {
+    static WorkflowId of(Document document) {
+      return new WorkflowId(document.getNamespace(), document.getName(), document.getVersion());
+    }
+  }
+
+  public WorkflowDefinition workflowDefinition(Workflow workflow) {
+    return definitions.computeIfAbsent(
+        WorkflowId.of(workflow.getDocument()), k -> WorkflowDefinition.of(this, workflow));
+  }
+
+  @Override
+  public void close() throws Exception {
+    for (WorkflowDefinition definition : definitions.values()) {
+      definition.close();
+    }
+    definitions.clear();
+  }
+}

impl/src/main/java/io/serverlessworkflow/impl/WorkflowContext.java

@@ -20,24 +20,31 @@
 
 public class WorkflowContext {
   private final WorkflowPosition position;
-  private JsonNode context;
+  private final WorkflowDefinition definition;
   private final JsonNode input;
+  private JsonNode current;
+  private JsonNode context;
 
-  private WorkflowContext(WorkflowPosition position, JsonNode input) {
+  private WorkflowContext(
+      WorkflowPosition position, WorkflowDefinition definition, JsonNode input) {
     this.position = position;
+    this.definition = definition;
     this.input = input;
+    this.current = input.deepCopy();
     this.context = JsonUtils.mapper().createObjectNode();
   }
 
-  public static Builder builder(JsonNode input) {
-    return new Builder(input);
+  public static Builder builder(WorkflowDefinition definition, JsonNode input) {
+    return new Builder(definition, input);
   }
 
   public static class Builder {
     private WorkflowPosition position = new DefaultWorkflowPosition();
+    private WorkflowDefinition definition;
     private JsonNode input;
 
-    private Builder(JsonNode input) {
+    private Builder(WorkflowDefinition definition, JsonNode input) {
+      this.definition = definition;
       this.input = input;
     }
 
@@ -47,7 +54,7 @@ public Builder position(WorkflowPosition position) {
     }
 
     public WorkflowContext build() {
-      return new WorkflowContext(position, input);
+      return new WorkflowContext(position, definition, input);
     }
   }
 
@@ -66,4 +73,16 @@ public void context(JsonNode context) {
   public JsonNode rawInput() {
     return input;
   }
+
+  public void current(JsonNode output) {
+    this.current = output;
+  }
+
+  public JsonNode current() {
+    return current;
+  }
+
+  public WorkflowDefinition definition() {
+    return definition;
+  }
 }