Add module for AC Element implementation

Refactored unused participant simulator module to implement AC element
microservice for ACM testing purposes. Empty spring project added.
Business logics will be added as a separate review on top of this structure.

Issue-ID: POLICY-4312
Signed-off-by: zrrmmua <ramesh.murugan.iyer@est.tech>
Change-Id: I8fc280083ce4b759ed9ab23b223cf1555176ef62

8 files changed, 355 insertions, 0 deletions

diff --git a/participant/participant-impl/participant-impl-acelement/src/main/java/org/onap/policy/clamp/acm/element/AcElementApplication.java b/participant/participant-impl/participant-impl-acelement/src/main/java/org/onap/policy/clamp/acm/element/AcElementApplication.java
new file mode 100644
index 000000000..9991c4cee
--- /dev/null
+++ b/participant/participant-impl/participant-impl-acelement/src/main/java/org/onap/policy/clamp/acm/element/AcElementApplication.java
@@ -0,0 +1,36 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2021-2022 Nordix Foundation.
+ * ================================================================================
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.clamp.acm.element;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ * Starter.
+ *
+ */
+@SpringBootApplication
+public class AcElementApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(AcElementApplication.class, args);
+    }
+}
diff --git a/participant/participant-impl/participant-impl-acelement/src/main/java/org/onap/policy/clamp/acm/element/config/SecurityConfig.java b/participant/participant-impl/participant-impl-acelement/src/main/java/org/onap/policy/clamp/acm/element/config/SecurityConfig.java
new file mode 100644
index 000000000..b2609d358
--- /dev/null
+++ b/participant/participant-impl/participant-impl-acelement/src/main/java/org/onap/policy/clamp/acm/element/config/SecurityConfig.java
@@ -0,0 +1,39 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2021-2022 Nordix Foundation.
+ * ================================================================================
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.clamp.acm.element.config;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
+
+@Configuration
+public class SecurityConfig extends WebSecurityConfigurerAdapter {
+
+    @Override
+    protected void configure(HttpSecurity http) throws Exception {
+        // @formatter:off
+        http.authorizeRequests()
+            .antMatchers().authenticated()
+            .anyRequest().authenticated()
+            .and().httpBasic().and().csrf().disable();
+        // @formatter:on
+    }
+}
diff --git a/participant/participant-impl/participant-impl-acelement/src/main/java/org/onap/policy/clamp/acm/element/config/SpringFoxConfig.java b/participant/participant-impl/participant-impl-acelement/src/main/java/org/onap/policy/clamp/acm/element/config/SpringFoxConfig.java
new file mode 100644
index 000000000..4e88e364a
--- /dev/null
+++ b/participant/participant-impl/participant-impl-acelement/src/main/java/org/onap/policy/clamp/acm/element/config/SpringFoxConfig.java
@@ -0,0 +1,46 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2021-2022 Nordix Foundation.
+ * ================================================================================
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.clamp.acm.element.config;
+
+import org.onap.policy.clamp.acm.element.main.rest.AcElementController;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import springfox.documentation.builders.PathSelectors;
+import springfox.documentation.builders.RequestHandlerSelectors;
+import springfox.documentation.spi.DocumentationType;
+import springfox.documentation.spring.web.plugins.Docket;
+
+@Configuration
+public class SpringFoxConfig {
+
+    /**
+     * Docket Spring Fox Config.
+     *
+     * @return Docket
+     */
+    @Bean
+    public Docket api() {
+        return new Docket(DocumentationType.SWAGGER_2).select()
+                .apis(RequestHandlerSelectors.basePackage(AcElementController.class.getPackageName()))
+                .paths(PathSelectors.any()).build();
+    }
+}
+
diff --git a/participant/participant-impl/participant-impl-acelement/src/main/java/org/onap/policy/clamp/acm/element/main/parameters/AcElement.java b/participant/participant-impl/participant-impl-acelement/src/main/java/org/onap/policy/clamp/acm/element/main/parameters/AcElement.java
new file mode 100644
index 000000000..bb80cc638
--- /dev/null
+++ b/participant/participant-impl/participant-impl-acelement/src/main/java/org/onap/policy/clamp/acm/element/main/parameters/AcElement.java
@@ -0,0 +1,42 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2022 Nordix Foundation.
+ * ================================================================================
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.clamp.acm.element.main.parameters;
+
+
+import javax.validation.Valid;
+import javax.validation.constraints.NotNull;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaConceptIdentifier;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.stereotype.Component;
+
+@Data
+@NoArgsConstructor
+@Component
+@ConfigurationProperties(prefix = "element")
+public class AcElement {
+
+    // The name and version of this AC element
+    @NotNull
+    @Valid
+    private ToscaConceptIdentifier elementId;
+}
diff --git a/participant/participant-impl/participant-impl-acelement/src/main/java/org/onap/policy/clamp/acm/element/main/rest/AcElementController.java b/participant/participant-impl/participant-impl-acelement/src/main/java/org/onap/policy/clamp/acm/element/main/rest/AcElementController.java
new file mode 100644
index 000000000..833819a13
--- /dev/null
+++ b/participant/participant-impl/participant-impl-acelement/src/main/java/org/onap/policy/clamp/acm/element/main/rest/AcElementController.java
@@ -0,0 +1,29 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2022 Nordix Foundation.
+ * ================================================================================
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.clamp.acm.element.main.rest;
+
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class AcElementController {
+
+    //TODO : Implement REST methods for configuring Dmaap topic
+}
diff --git a/participant/participant-impl/participant-impl-acelement/src/main/java/org/onap/policy/clamp/acm/element/main/rest/AcElementErrorController.java b/participant/participant-impl/participant-impl-acelement/src/main/java/org/onap/policy/clamp/acm/element/main/rest/AcElementErrorController.java
new file mode 100644
index 000000000..717390088
--- /dev/null
+++ b/participant/participant-impl/participant-impl-acelement/src/main/java/org/onap/policy/clamp/acm/element/main/rest/AcElementErrorController.java
@@ -0,0 +1,96 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2021-2022 Nordix Foundation.
+ * ================================================================================
+ * Modifications Copyright (C) 2021 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.clamp.acm.element.main.rest;
+
+import java.util.Map;
+import javax.servlet.RequestDispatcher;
+import javax.servlet.http.HttpServletRequest;
+import org.onap.policy.clamp.models.acm.messages.rest.SimpleResponse;
+import org.onap.policy.clamp.models.acm.messages.rest.TypedSimpleResponse;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.web.error.ErrorAttributeOptions;
+import org.springframework.boot.web.servlet.error.ErrorAttributes;
+import org.springframework.boot.web.servlet.error.ErrorController;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.context.request.ServletWebRequest;
+
+@Controller
+public class AcElementErrorController implements ErrorController {
+
+    private final ErrorAttributes errorAttributes;
+
+    @Value("${server.error.path}")
+    private String path;
+
+    /**
+     * Constructor.
+     *
+     * @param errorAttributes ErrorAttributes
+     */
+    public AcElementErrorController(ErrorAttributes errorAttributes) {
+        this.errorAttributes = errorAttributes;
+    }
+
+    protected HttpStatus getStatus(HttpServletRequest request) {
+        Integer statusCode = (Integer) request.getAttribute(RequestDispatcher.ERROR_STATUS_CODE);
+        if (statusCode == null) {
+            return HttpStatus.INTERNAL_SERVER_ERROR;
+        }
+        try {
+            return HttpStatus.valueOf(statusCode);
+        } catch (Exception ex) {
+            return HttpStatus.INTERNAL_SERVER_ERROR;
+        }
+    }
+
+    /**
+     * Handle Errors not handled to GlobalControllerExceptionHandler.
+     *
+     * @param request HttpServletRequest
+     * @return ResponseEntity
+     */
+    @RequestMapping(value = "${server.error.path}", produces = MediaType.APPLICATION_JSON_VALUE)
+    public ResponseEntity<TypedSimpleResponse<SimpleResponse>> handleError(HttpServletRequest request) {
+        Map<String, Object> map = this.errorAttributes.getErrorAttributes(new ServletWebRequest(request),
+                ErrorAttributeOptions.defaults());
+
+        var sb = new StringBuilder();
+        final Object error = map.get("error");
+        if (error != null) {
+            sb.append(error.toString() + " ");
+        }
+        final Object message = map.get("message");
+        if (message != null) {
+            sb.append(message.toString());
+        }
+
+        TypedSimpleResponse<SimpleResponse> resp = new TypedSimpleResponse<>();
+        resp.setErrorDetails(sb.toString());
+
+        return ResponseEntity.status(getStatus(request)).body(resp);
+    }
+}
diff --git a/participant/participant-impl/participant-impl-acelement/src/main/java/org/onap/policy/clamp/acm/element/main/rest/GlobalControllerExceptionHandler.java b/participant/participant-impl/participant-impl-acelement/src/main/java/org/onap/policy/clamp/acm/element/main/rest/GlobalControllerExceptionHandler.java
new file mode 100644
index 000000000..bb56bf993
--- /dev/null
+++ b/participant/participant-impl/participant-impl-acelement/src/main/java/org/onap/policy/clamp/acm/element/main/rest/GlobalControllerExceptionHandler.java
@@ -0,0 +1,45 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2021-2022 Nordix Foundation.
+ * ================================================================================
+ * Modifications Copyright (C) 2021 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.clamp.acm.element.main.rest;
+
+import org.onap.policy.clamp.common.acm.exception.AutomationCompositionException;
+import org.onap.policy.clamp.models.acm.messages.rest.SimpleResponse;
+import org.onap.policy.clamp.models.acm.rest.RestUtils;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+
+@RestControllerAdvice
+public class GlobalControllerExceptionHandler {
+
+    /**
+     * Handle AutomationCompositionException.
+     *
+     * @param ex AutomationCompositionException
+     * @return ResponseEntity
+     */
+    @ExceptionHandler(AutomationCompositionException.class)
+    public ResponseEntity<SimpleResponse> handleBadRequest(AutomationCompositionException ex) {
+        return RestUtils.toSimpleResponse(ex);
+    }
+}
diff --git a/participant/participant-impl/participant-impl-acelement/src/main/resources/config/application.yaml b/participant/participant-impl/participant-impl-acelement/src/main/resources/config/application.yaml
new file mode 100644
index 000000000..4a0f0d301
--- /dev/null
+++ b/participant/participant-impl/participant-impl-acelement/src/main/resources/config/application.yaml
@@ -0,0 +1,22 @@
+spring:
+  security:
+    user:
+      name: acmUser
+      password: zb!XztG34
+
+server:
+  port: 8084
+  servlet:
+    context-path: /onap/policy/clamp/acelement/
+  error:
+    path: /error
+
+element:
+  elementId:
+    name: onap.policy.clamp.ac.element1
+    version: 1.0.0
+management:
+  endpoints:
+    web:
+      exposure:
+        include: health, metrics, prometheus
\ No newline at end of file