[Fix #928] Adding config and secret manager

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

@@ -20,6 +20,9 @@
 import io.serverlessworkflow.api.types.SchemaInline;
 import io.serverlessworkflow.api.types.Workflow;
 import io.serverlessworkflow.impl.additional.WorkflowAdditionalObject;
+import io.serverlessworkflow.impl.config.ConfigManager;
+import io.serverlessworkflow.impl.config.SecretManager;
+import io.serverlessworkflow.impl.config.SystemPropertyConfigManager;
 import io.serverlessworkflow.impl.events.EventConsumer;
 import io.serverlessworkflow.impl.events.EventPublisher;
 import io.serverlessworkflow.impl.events.InMemoryEvents;
@@ -37,6 +40,7 @@
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
+import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Map;
 import java.util.Optional;
@@ -64,6 +68,8 @@ public class WorkflowApplication implements AutoCloseable {
   private final WorkflowModelFactory modelFactory;
   private final WorkflowScheduler scheduler;
   private final Map<String, WorkflowAdditionalObject<?>> additionalObjects;
+  private final ConfigManager configManager;
+  private final SecretManager secretManager;
 
   private WorkflowApplication(Builder builder) {
     this.taskFactory = builder.taskFactory;
@@ -82,6 +88,8 @@ private WorkflowApplication(Builder builder) {
     this.modelFactory = builder.modelFactory;
     this.scheduler = builder.scheduler;
     this.additionalObjects = builder.additionalObjects;
+    this.configManager = builder.configManager;
+    this.secretManager = builder.secretManager;
   }
 
   public TaskExecutorFactory taskFactory() {
@@ -158,6 +166,8 @@ public SchemaValidator getValidator(SchemaInline inline) {
     private boolean lifeCycleCEPublishingEnabled = true;
     private WorkflowModelFactory modelFactory;
     private Map<String, WorkflowAdditionalObject<?>> additionalObjects;
+    private SecretManager secretManager;
+    private ConfigManager configManager;
 
     private Builder() {}
 
@@ -226,10 +236,20 @@ public Builder withEventPublisher(EventPublisher eventPublisher) {
       return this;
     }
 
+    public Builder withSecretManager(SecretManager secretManager) {
+      this.secretManager = secretManager;
+      return this;
+    }
+
+    public Builder withConfigManager(ConfigManager configManager) {
+      this.configManager = configManager;
+      return this;
+    }
+
     public <T> Builder withAdditionalObject(
         String name, WorkflowAdditionalObject<T> additionalObject) {
       if (additionalObjects == null) {
-        additionalObjects = new ConcurrentHashMap<>();
+        additionalObjects = new HashMap<>();
       }
       additionalObjects.put(name, additionalObject);
       return this;
@@ -286,7 +306,18 @@ public WorkflowApplication build() {
       if (additionalObjects == null) {
         additionalObjects = Collections.emptyMap();
       }
-
+      if (configManager == null) {
+        configManager =
+            ServiceLoader.load(ConfigManager.class)
+                .findFirst()
+                .orElseGet(() -> new SystemPropertyConfigManager());
+      }
+      if (secretManager == null) {
+        secretManager =
+            ServiceLoader.load(SecretManager.class)
+                .findFirst()
+                .orElseGet(() -> s -> configManager.config(s, String.class));
+      }
       return new WorkflowApplication(this);
     }
   }
@@ -348,6 +379,14 @@ public WorkflowScheduler scheduler() {
     return scheduler;
   }
 
+  public ConfigManager configManager() {
+    return configManager;
+  }
+
+  public SecretManager secretManager() {
+    return secretManager;
+  }
+
   public <T> Optional<T> additionalObject(
       String name, WorkflowContext workflowContext, TaskContext taskContext) {
     return Optional.ofNullable(additionalObjects.get(name))

impl/core/src/main/java/io/serverlessworkflow/impl/WorkflowError.java

@@ -20,35 +20,36 @@
 public record WorkflowError(
     String type, int status, String instance, String title, String details) {
 
-  public static final Errors.Standard RUNTIME_TYPE = Errors.RUNTIME;
-  public static final Errors.Standard COMM_TYPE = Errors.COMMUNICATION;
-
   public static Builder error(String type, int status) {
     return new Builder(type, status);
   }
 
+  public static Builder authorization() {
+    return error(Errors.AUTHORIZATION.toString(), Errors.AUTHORIZATION.status());
+  }
+
   public static Builder communication(int status, TaskContext context, Exception ex) {
     return communication(status, context, ex.getMessage());
   }
 
   public static Builder communication(int status, TaskContext context, String title) {
-    return new Builder(COMM_TYPE.toString(), status)
+    return new Builder(Errors.COMMUNICATION.toString(), status)
         .instance(context.position().jsonPointer())
         .title(title);
   }
 
   public static Builder communication(TaskContext context, String title) {
-    return communication(COMM_TYPE.status(), context, title);
+    return communication(Errors.COMMUNICATION.status(), context, title);
   }
 
   public static Builder runtime(int status, TaskContext context, Exception ex) {
-    return new Builder(RUNTIME_TYPE.toString(), status)
+    return new Builder(Errors.RUNTIME.toString(), status)
         .instance(context.position().jsonPointer())
         .title(ex.getMessage());
   }
 
   public static Builder runtime(TaskContext context, Exception ex) {
-    return runtime(RUNTIME_TYPE.status(), context, ex);
+    return runtime(Errors.RUNTIME.status(), context, ex);
   }
 
   public static class Builder {

impl/core/src/main/java/io/serverlessworkflow/impl/config/AbstractConfigManager.java

@@ -0,0 +1,60 @@
+/*
+ * 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.config;
+
+import java.time.Instant;
+import java.time.OffsetDateTime;
+import java.util.Optional;
+
+public abstract class AbstractConfigManager implements ConfigManager {
+
+  @Override
+  public <T> Optional<T> config(String propName, Class<T> propClass) {
+    return Optional.ofNullable(get(propName)).map(v -> convert(v, propClass));
+  }
+
+  protected abstract String get(String propName);
+
+  protected <T> T convert(String value, Class<T> propClass) {
+    Object result;
+    if (String.class.isAssignableFrom(propClass)) {
+      result = value;
+    } else if (Boolean.class.isAssignableFrom(propClass)) {
+      result = Boolean.parseBoolean(value);
+    } else if (Integer.class.isAssignableFrom(propClass)) {
+      result = Integer.parseInt(value);
+    } else if (Long.class.isAssignableFrom(propClass)) {
+      result = Long.parseLong(value);
+    } else if (Double.class.isAssignableFrom(propClass)) {
+      result = Double.parseDouble(value);
+    } else if (Float.class.isAssignableFrom(propClass)) {
+      result = Float.parseFloat(value);
+    } else if (Short.class.isAssignableFrom(propClass)) {
+      result = Short.parseShort(value);
+    } else if (Byte.class.isAssignableFrom(propClass)) {
+      result = Byte.parseByte(value);
+    } else if (Instant.class.isAssignableFrom(propClass)) {
+      result = Instant.parse(value);
+    } else if (OffsetDateTime.class.isAssignableFrom(propClass)) {
+      result = OffsetDateTime.parse(value);
+    } else {
+      result = convertComplex(value, propClass);
+    }
+    return propClass.cast(result);
+  }
+
+  protected abstract <T> T convertComplex(String value, Class<T> propClass);
+}

impl/core/src/main/java/io/serverlessworkflow/impl/config/ConfigManager.java

@@ -0,0 +1,23 @@
+/*
+ * 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.config;
+
+import io.serverlessworkflow.impl.ServicePriority;
+import java.util.Optional;
+
+public interface ConfigManager extends ServicePriority {
+  <T> Optional<T> config(String propName, Class<T> propClass);
+}

impl/core/src/main/java/io/serverlessworkflow/impl/config/SecretManager.java

@@ -0,0 +1,24 @@
+/*
+ * 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.config;
+
+import io.serverlessworkflow.impl.ServicePriority;
+import java.util.Optional;
+
+@FunctionalInterface
+public interface SecretManager extends ServicePriority {
+  Optional<String> secret(String secretName);
+}

impl/core/src/main/java/io/serverlessworkflow/impl/config/SystemPropertyConfigManager.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.config;
+
+public class SystemPropertyConfigManager extends AbstractConfigManager {
+
+  @Override
+  protected String get(String propName) {
+    return System.getProperty(propName);
+  }
+
+  @Override
+  protected <T> T convertComplex(String value, Class<T> propClass) {
+    throw new UnsupportedOperationException(
+        "Conversion of property " + value + " to class " + propClass + " is not supported");
+  }
+}

impl/jq/src/main/java/io/serverlessworkflow/impl/expressions/jq/JQExpression.java

@@ -21,10 +21,13 @@
 import com.fasterxml.jackson.databind.node.ArrayNode;
 import io.serverlessworkflow.impl.TaskContext;
 import io.serverlessworkflow.impl.WorkflowContext;
+import io.serverlessworkflow.impl.WorkflowError;
+import io.serverlessworkflow.impl.WorkflowException;
 import io.serverlessworkflow.impl.WorkflowModel;
 import io.serverlessworkflow.impl.expressions.ObjectExpression;
 import io.serverlessworkflow.impl.expressions.TaskDescriptor;
 import io.serverlessworkflow.impl.expressions.WorkflowDescriptor;
+import io.serverlessworkflow.impl.jackson.FunctionJsonNode;
 import io.serverlessworkflow.impl.jackson.JsonUtils;
 import java.util.function.Supplier;
 import net.thisptr.jackson.jq.Output;
@@ -91,6 +94,17 @@ private Scope createScope(WorkflowContext workflow, TaskContext task) {
       task.variables().forEach((k, v) -> childScope.setValue(k, JsonUtils.fromValue(v)));
     }
     if (workflow != null) {
+      childScope.setValue(
+          "secret",
+          new FunctionJsonNode(
+              k ->
+                  workflow
+                      .definition()
+                      .application()
+                      .secretManager()
+                      .secret(k)
+                      .orElseThrow(
+                          () -> new WorkflowException(WorkflowError.authorization().build()))));
       childScope.setValue("context", modelToJson(workflow.context()));
       childScope.setValue(
           "runtime",