Implement so-oof-adapter to handle OOF Callback

	- Add NSI/NST selection callback for Networkslicing

Issue-ID: SO-3205
Signed-off-by: Priyadharshini <priyadharshini.b96@wipro.com>
Change-Id: Ica88d503495949ecce8b897c3a990fbdaa5d4f0e

9 files changed, 515 insertions, 0 deletions

diff --git a/adapters/mso-oof-adapter/src/main/java/org/onap/so/adapters/oof/MsoOofAdapterApplication.java b/adapters/mso-oof-adapter/src/main/java/org/onap/so/adapters/oof/MsoOofAdapterApplication.java
new file mode 100644
index 0000000000..78fbe6e271
--- /dev/null
+++ b/adapters/mso-oof-adapter/src/main/java/org/onap/so/adapters/oof/MsoOofAdapterApplication.java
@@ -0,0 +1,32 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP - SO
+ * ================================================================================
+ * Copyright (C) 2020 Wipro Limited. 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.so.adapters.oof;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class MsoOofAdapterApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(MsoOofAdapterApplication.class, args);
+    }
+}
diff --git a/adapters/mso-oof-adapter/src/main/java/org/onap/so/adapters/oof/OofAdapterClientConfig.java b/adapters/mso-oof-adapter/src/main/java/org/onap/so/adapters/oof/OofAdapterClientConfig.java
new file mode 100644
index 0000000000..5e13c592b7
--- /dev/null
+++ b/adapters/mso-oof-adapter/src/main/java/org/onap/so/adapters/oof/OofAdapterClientConfig.java
@@ -0,0 +1,76 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP - SO
+ * ================================================================================
+ * Copyright (C) 2020 Wipro Limited. 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.so.adapters.oof;
+
+import javax.net.ssl.HostnameVerifier;
+import javax.net.ssl.SSLContext;
+import javax.net.ssl.SSLSession;
+import javax.net.ssl.TrustManager;
+import javax.net.ssl.X509TrustManager;
+import org.apache.http.client.HttpClient;
+import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
+import org.apache.http.impl.client.HttpClients;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
+import org.springframework.web.client.RestTemplate;
+
+@Configuration
+public class OofAdapterClientConfig {
+
+    @Bean
+    public RestTemplate getRestTemplate() {
+        HttpComponentsClientHttpRequestFactory requestFactory =
+                new HttpComponentsClientHttpRequestFactory(getHttpsClient());
+        requestFactory.setConnectTimeout(60000);
+        requestFactory.setReadTimeout(60000);
+        return new RestTemplate(requestFactory);
+    }
+
+    private HttpClient getHttpsClient() {
+        TrustManager[] trustAllCerts = new TrustManager[] {new X509TrustManager() {
+            public java.security.cert.X509Certificate[] getAcceptedIssuers() {
+                return null;
+            }
+
+            public void checkClientTrusted(java.security.cert.X509Certificate[] certs, String authType) {}
+
+            public void checkServerTrusted(java.security.cert.X509Certificate[] certs, String authType) {}
+        }};
+
+        // Install the all-trusting trust manager
+        try {
+            SSLContext sc = SSLContext.getInstance("SSL");
+            sc.init(null, trustAllCerts, new java.security.SecureRandom());
+            HostnameVerifier hostnameVerifier = new HostnameVerifier() {
+                @Override
+                public boolean verify(String hostname, SSLSession session) {
+                    return true;
+                }
+            };
+            SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sc,
+                    new String[] {"TLSv1", "TLSv1.1", "TLSv1.2", "TLSv1.3"}, null, hostnameVerifier);
+            return HttpClients.custom().setSSLSocketFactory(sslsf).build();
+        } catch (Exception e) {
+            throw new IllegalArgumentException(e);
+        }
+    }
+}
diff --git a/adapters/mso-oof-adapter/src/main/java/org/onap/so/adapters/oof/WebSecurityConfig.java b/adapters/mso-oof-adapter/src/main/java/org/onap/so/adapters/oof/WebSecurityConfig.java
new file mode 100644
index 0000000000..9a07b0119f
--- /dev/null
+++ b/adapters/mso-oof-adapter/src/main/java/org/onap/so/adapters/oof/WebSecurityConfig.java
@@ -0,0 +1,37 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP - SO
+ * ================================================================================
+ * Copyright (C) 2020 Wipro Limited. 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.so.adapters.oof;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
+import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
+
+@EnableWebSecurity
+@Configuration
+public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
+
+    @Override
+    protected void configure(HttpSecurity http) throws Exception {
+        http.csrf().disable();
+    }
+
+}
diff --git a/adapters/mso-oof-adapter/src/main/java/org/onap/so/adapters/oof/constants/Constants.java b/adapters/mso-oof-adapter/src/main/java/org/onap/so/adapters/oof/constants/Constants.java
new file mode 100644
index 0000000000..5d91bf38f8
--- /dev/null
+++ b/adapters/mso-oof-adapter/src/main/java/org/onap/so/adapters/oof/constants/Constants.java
@@ -0,0 +1,31 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP - SO
+ * ================================================================================
+ * Copyright (C) 2020 Wipro Limited. 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.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.so.adapters.oof.constants;
+
+public class Constants {
+
+    public static final String OOF_ENDPOINT = "mso.oof.endpoint";
+    public static final String OOF_AUTH = "mso.oof.auth";
+    public static final String MSO_KEY = "mso.msoKey";
+    public static final String CAMUNDA_URL = "mso.camundaURL";
+    public static final String CAMUNDA_AUTH = "mso.camundaAuth";
+    public static final String WORKFLOW_MESSAGE_ENPOINT = "mso.workflow.message.endpoint";
+
+}
diff --git a/adapters/mso-oof-adapter/src/main/java/org/onap/so/adapters/oof/exceptions/OofAdapterException.java b/adapters/mso-oof-adapter/src/main/java/org/onap/so/adapters/oof/exceptions/OofAdapterException.java
new file mode 100644
index 0000000000..ff16d7442c
--- /dev/null
+++ b/adapters/mso-oof-adapter/src/main/java/org/onap/so/adapters/oof/exceptions/OofAdapterException.java
@@ -0,0 +1,39 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP - SO
+ * ================================================================================
+ * Copyright (C) 2020 Wipro Limited. 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.so.adapters.oof.exceptions;
+
+public class OofAdapterException extends Exception {
+
+    private static final long serialVersionUID = 1L;
+
+    public OofAdapterException(String message) {
+        super(message);
+    }
+
+    public OofAdapterException(Throwable e) {
+        super(e);
+    }
+
+    public OofAdapterException(String message, Throwable e) {
+        super(message, e);
+    }
+
+}
diff --git a/adapters/mso-oof-adapter/src/main/java/org/onap/so/adapters/oof/model/OofRequest.java b/adapters/mso-oof-adapter/src/main/java/org/onap/so/adapters/oof/model/OofRequest.java
new file mode 100644
index 0000000000..1eb694fd96
--- /dev/null
+++ b/adapters/mso-oof-adapter/src/main/java/org/onap/so/adapters/oof/model/OofRequest.java
@@ -0,0 +1,52 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP - SO
+ * ================================================================================
+ * Copyright (C) 2020 Wipro Limited. 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.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.so.adapters.oof.model;
+
+/**
+ * POJO representing generic request payload from BPMN processes
+ */
+public class OofRequest {
+
+    private String apiPath;
+
+    private Object requestDetails;
+
+    public String getApiPath() {
+        return apiPath;
+    }
+
+    public void setApiPath(String apiPath) {
+        this.apiPath = apiPath;
+    }
+
+    public Object getRequestDetails() {
+        return requestDetails;
+    }
+
+    public void setRequestDetails(Object requestDetails) {
+        this.requestDetails = requestDetails;
+    }
+
+    @Override
+    public String toString() {
+        return "{\"apiPath:\"\"" + apiPath + "\"\", requestDetails:\"\"" + requestDetails + "}";
+    }
+
+}
diff --git a/adapters/mso-oof-adapter/src/main/java/org/onap/so/adapters/oof/rest/OofCallbackHandler.java b/adapters/mso-oof-adapter/src/main/java/org/onap/so/adapters/oof/rest/OofCallbackHandler.java
new file mode 100644
index 0000000000..f8da6c6d2e
--- /dev/null
+++ b/adapters/mso-oof-adapter/src/main/java/org/onap/so/adapters/oof/rest/OofCallbackHandler.java
@@ -0,0 +1,71 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP - SO
+ * ================================================================================
+ * Copyright (C) 2020 Wipro Limited. 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.so.adapters.oof.rest;
+
+import org.onap.so.adapters.oof.exceptions.OofAdapterException;
+import org.onap.so.adapters.oof.utils.OofUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpEntity;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.client.RestTemplate;
+
+/**
+ * A generic call back handler to receive async response from OOF
+ */
+@RestController
+@RequestMapping("/so/adapters/oof/callback/")
+public class OofCallbackHandler {
+
+    @Autowired
+    OofUtils utils;
+
+    @Autowired
+    RestTemplate restTemplate;
+
+    private static final Logger logger = LoggerFactory.getLogger(OofCallbackHandler.class);
+
+    @PostMapping("/{version:[vV][1]}/{messageEventName}/{correlator}")
+    public ResponseEntity<String> processCallback(@PathVariable("messageEventName") String messageEventName,
+            @PathVariable("correlator") String correlator, @RequestBody String oofCallbackRequest)
+            throws OofAdapterException {
+        logger.debug("Oof Async response received for event : {} , callback request body : {} ", messageEventName,
+                oofCallbackRequest);
+        String camundaMsgUrl = utils.getCamundaMsgUrl(messageEventName, correlator);
+        HttpEntity<String> request = new HttpEntity<String>(oofCallbackRequest, utils.getCamundaHeaders());
+        try {
+            ResponseEntity<String> response = restTemplate.postForEntity(camundaMsgUrl, request, String.class);
+            logger.debug("Response from BPMN : {} ", response);
+            return response;
+        } catch (Exception e) {
+            logger.warn("Error injecting message event into BPMN {} {} ", e.getCause(), e.getMessage());
+            throw new OofAdapterException(e);
+        }
+
+    }
+
+}
diff --git a/adapters/mso-oof-adapter/src/main/java/org/onap/so/adapters/oof/rest/OofClient.java b/adapters/mso-oof-adapter/src/main/java/org/onap/so/adapters/oof/rest/OofClient.java
new file mode 100644
index 0000000000..3a91ec495e
--- /dev/null
+++ b/adapters/mso-oof-adapter/src/main/java/org/onap/so/adapters/oof/rest/OofClient.java
@@ -0,0 +1,67 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP - SO
+ * ================================================================================
+ * Copyright (C) 2020 Wipro Limited. 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.so.adapters.oof.rest;
+
+import org.onap.so.adapters.oof.exceptions.OofAdapterException;
+import org.onap.so.adapters.oof.model.OofRequest;
+import org.onap.so.adapters.oof.utils.OofUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpEntity;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.client.RestTemplate;
+
+/**
+ * A generic client class to call OOF with request from BPMN
+ */
+@RestController
+@RequestMapping("/so/adapters/oof/")
+public class OofClient {
+
+    @Autowired
+    RestTemplate restTemplate;
+
+    @Autowired
+    OofUtils utils;
+
+    private static final Logger logger = LoggerFactory.getLogger(OofClient.class);
+
+    @PostMapping("/{version:[vV][1]}")
+    public ResponseEntity<String> callOof(@RequestBody OofRequest oofRequest) throws OofAdapterException {
+        try {
+            logger.debug("Received Request from BPEL {} ", oofRequest);
+            String oofUrl = utils.getOofurl(oofRequest.getApiPath());
+            HttpEntity<?> request = new HttpEntity<>(oofRequest.getRequestDetails(), utils.getOofHttpHeaders());
+            ResponseEntity<String> response = restTemplate.postForEntity(oofUrl, request, String.class);
+            logger.debug("Response from OOF : {} ", response);
+            return response;
+        } catch (Exception e) {
+            logger.warn("Error while calling OOF {} {} ", e.getCause(), e.getMessage());
+            throw new OofAdapterException(e);
+        }
+    }
+
+}
diff --git a/adapters/mso-oof-adapter/src/main/java/org/onap/so/adapters/oof/utils/OofUtils.java b/adapters/mso-oof-adapter/src/main/java/org/onap/so/adapters/oof/utils/OofUtils.java
new file mode 100644
index 0000000000..f45baa30fe
--- /dev/null
+++ b/adapters/mso-oof-adapter/src/main/java/org/onap/so/adapters/oof/utils/OofUtils.java
@@ -0,0 +1,110 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP - SO
+ * ================================================================================
+ * Copyright (C) 2020 Wipro Limited. 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.so.adapters.oof.utils;
+
+import java.security.GeneralSecurityException;
+import java.util.ArrayList;
+import java.util.List;
+import javax.xml.bind.DatatypeConverter;
+import org.onap.so.adapters.oof.constants.Constants;
+import org.onap.so.utils.CryptoUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.core.env.Environment;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.MediaType;
+import org.springframework.stereotype.Component;
+
+@Component
+public class OofUtils {
+    private static Logger logger = LoggerFactory.getLogger(OofUtils.class);
+
+    @Autowired
+    private Environment env;
+
+    /**
+     * @param messageEventName
+     * @param correlator
+     * @return
+     */
+    public String getCamundaMsgUrl(String messageEventName, String correlator) {
+        System.out.println(env);
+        String camundaMsgUrl = new StringBuilder(env.getRequiredProperty(Constants.WORKFLOW_MESSAGE_ENPOINT))
+                .append("/").append(messageEventName).append("/").append(correlator).toString();
+        return camundaMsgUrl;
+    }
+
+    /**
+     * @return
+     */
+    public HttpHeaders getCamundaHeaders() {
+        HttpHeaders headers = new HttpHeaders();
+        List<MediaType> acceptableMediaTypes = new ArrayList<>();
+        acceptableMediaTypes.add(MediaType.ALL);
+        headers.setAccept(acceptableMediaTypes);
+        headers.setContentType(MediaType.APPLICATION_JSON);
+        headers.add(HttpHeaders.AUTHORIZATION, addAuthorizationHeader(env.getRequiredProperty(Constants.CAMUNDA_AUTH),
+                env.getRequiredProperty(Constants.MSO_KEY)));
+        return headers;
+    }
+
+    /**
+     * @param auth
+     * @param msoKey
+     * @return
+     */
+    protected String addAuthorizationHeader(String auth, String msoKey) {
+        String basicAuth = null;
+        try {
+            String userCredentials = CryptoUtils.decrypt(auth, msoKey);
+            if (userCredentials != null) {
+                basicAuth = "Basic " + DatatypeConverter.printBase64Binary(userCredentials.getBytes());
+            }
+        } catch (GeneralSecurityException e) {
+            logger.error("Security exception", e);
+        }
+        return basicAuth;
+    }
+
+    /**
+     * @return
+     * @throws Exception
+     */
+    public HttpHeaders getOofHttpHeaders() throws Exception {
+        HttpHeaders headers = new HttpHeaders();
+        List<MediaType> acceptableMediaTypes = new ArrayList<>();
+        acceptableMediaTypes.add(MediaType.APPLICATION_JSON);
+        headers.setAccept(acceptableMediaTypes);
+        headers.setContentType(MediaType.APPLICATION_JSON);
+        return headers;
+    }
+
+    /**
+     * @param apiPath
+     * @return
+     */
+    public String getOofurl(String apiPath) {
+        return new StringBuilder(env.getRequiredProperty(Constants.OOF_ENDPOINT)).append(apiPath).toString();
+    }
+
+
+}