[GitHub] [camel-kafka-connector] apupier commented on a change in pull request #548: Catalog: expose an API for consuming connectors catalog metadata and options

[GitBox <gi...@apache.org>]

apupier commented on a change in pull request #548:
URL: https://github.com/apache/camel-kafka-connector/pull/548#discussion_r502265391



##########
File path: camel-kafka-connector-catalog/src/main/java/org/apache/camel/kafkaconnector/catalog/CamelKafkaConnectorCatalog.java
##########
@@ -0,0 +1,138 @@
+/*
+ * 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
+ *
+ *      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 org.apache.camel.kafkaconnector.catalog;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+import org.apache.camel.kafkaconnector.model.CamelKafkaConnectorModel;
+import org.apache.camel.kafkaconnector.model.CamelKafkaConnectorOptionModel;
+import org.apache.camel.tooling.model.JsonMapper;
+import org.apache.camel.util.json.JsonObject;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class CamelKafkaConnectorCatalog {
+
+    static List<String> connectorsName = new ArrayList<String>();
+    static Map<String, CamelKafkaConnectorModel> connectorsModel = new HashMap<String, CamelKafkaConnectorModel>();
+    private static final Logger LOG = LoggerFactory.getLogger(CamelKafkaConnectorCatalog.class);
+    private static final String CONNECTORS_DIR = "src/generated/resources/connectors";
+    private static final String DESCRIPTORS_DIR = "src/generated/resources/descriptors";
+    private static final String CONNECTORS_PROPERTIES = "connectors.properties";
+
+    public CamelKafkaConnectorCatalog() {
+        initCatalog();
+        generateModel();
+    }
+
+    private void generateModel() {
+        for (String connector : connectorsName) {
+            connectorsModel.put(connector, getConnectorModel(connector));
+        }
+    }
+
+    private void initCatalog() {
+        try (FileInputStream input = new FileInputStream(DESCRIPTORS_DIR + File.separator + CONNECTORS_PROPERTIES)) {
+
+            BufferedReader reader = new BufferedReader(new InputStreamReader(input));
+
+            while (reader.ready()) {
+                String connector = reader.readLine();
+                if (connector.equalsIgnoreCase("camel-coap-tcp-source")) {
+                    connectorsName.add("camel-coap+tcp-source");
+                } else if (connector.equalsIgnoreCase("camel-coaps-tcp-source")) {
+                    connectorsName.add("camel-coaps+tcp-source");
+                } else if (connector.equalsIgnoreCase("camel-coaps-tcp-sink")) {
+                    connectorsName.add("camel-coaps+tcp-sink");
+                } else if (connector.equalsIgnoreCase("camel-coap-tcp-sink")) {
+                    connectorsName.add("camel-coap+tcp-sink");
+                } else {
+                    connectorsName.add(connector);
+                }
+            }
+        } catch (FileNotFoundException e) {
+            LOG.error("Cannot find file: {}", e.getMessage(), e);
+        } catch (IOException e) {
+            LOG.error("IO Exception: {}", e.getMessage(), e);
+        }
+    }
+
+    public String getConnectorAsJson(String connectorName) {
+        String result = null;
+        try {
+            result = Files.lines(Paths.get(CONNECTORS_DIR + File.separator + connectorName + ".json")).parallel() // for
+                                                                                                                        // parallel
+                                                                                                                        // processing
+                .map(String::trim) // to change line
+                .collect(Collectors.joining());
+        } catch (IOException e) {
+            LOG.error("IO Exception: {}", e.getMessage(), e);
+        }
+        return result;
+    }
+
+    private CamelKafkaConnectorModel getConnectorModel(String connectorName) {
+        CamelKafkaConnectorModel model = new CamelKafkaConnectorModel();
+        String json = getConnectorAsJson(connectorName);
+        JsonObject obj = JsonMapper.deserialize(json);
+        JsonObject wrapper = (JsonObject)obj.get("connector");
+        model.setConnectorClass((String)wrapper.get("class"));
+        model.setArtifactId((String)wrapper.get("artifactId"));
+        model.setGroupId((String)wrapper.get("groupId"));
+        model.setType((String)wrapper.get("type"));
+        model.setVersion((String)wrapper.get("version"));
+        model.setOptions((List<CamelKafkaConnectorOptionModel>)getConnectorOptionModel(obj));
+        return model;
+    }
+
+    private List<CamelKafkaConnectorOptionModel> getConnectorOptionModel(JsonObject obj) {
+        List<CamelKafkaConnectorOptionModel> model = new ArrayList<CamelKafkaConnectorOptionModel>();
+        JsonObject wrapper = (JsonObject)obj.get("properties");
+        Set<String> options = wrapper.keySet();
+        for (String string : options) {
+            JsonObject object = (JsonObject)wrapper.get(string);
+            CamelKafkaConnectorOptionModel singleModel = new CamelKafkaConnectorOptionModel();
+            singleModel.setDefaultValue((String)object.get("defaultValue"));
+            singleModel.setPriority((String)object.get("priority"));
+            singleModel.setDescription((String)object.get("description"));
+            singleModel.setName((String)object.get("name"));
+            model.add(singleModel);
+        }
+        return model;
+    }
+
+    public List<String> getConnectorsName() {
+        return connectorsName;
+    }
+
+    public static Map<String, CamelKafkaConnectorModel> getConnectorsModel() {

Review comment:
       why this method is static?
   
   If accessed before an instanciation of the class happened, it will return an empty value.
   
   




----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.

For queries about this service, please contact Infrastructure at:
users@infra.apache.org