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Subject [GitHub] [nifi] sjyang18 commented on a change in pull request #4200: NIFI-7335: PutCosmosDocument to provide the cosmos sql api support for Azure Cosmos
Date Wed, 15 Apr 2020 21:27:37 GMT
sjyang18 commented on a change in pull request #4200: NIFI-7335: PutCosmosDocument to provide
the cosmos sql api support for Azure Cosmos 
URL: https://github.com/apache/nifi/pull/4200#discussion_r409144047
 
 

 ##########
 File path: nifi-nar-bundles/nifi-azure-bundle/nifi-azure-processors/src/main/java/org/apache/nifi/services/azure/cosmos/document/AzureCosmosDocumentConnectionControllerService.java
 ##########
 @@ -0,0 +1,192 @@
+/*
+ * 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.nifi.services.azure.cosmos.document;
+
+import org.apache.nifi.annotation.documentation.CapabilityDescription;
+import org.apache.nifi.annotation.documentation.Tags;
+
+import org.apache.nifi.annotation.lifecycle.OnEnabled;
+import org.apache.nifi.annotation.lifecycle.OnStopped;
+import org.apache.nifi.components.PropertyDescriptor;
+import org.apache.nifi.components.ValidationContext;
+import org.apache.nifi.components.ValidationResult;
+import org.apache.nifi.controller.AbstractControllerService;
+import org.apache.nifi.controller.ConfigurationContext;
+import org.apache.nifi.processor.util.StandardValidators;
+import org.apache.nifi.services.azure.cosmos.AzureCosmosDocumentConnectionService;
+import org.apache.nifi.util.StringUtils;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+import com.azure.cosmos.ConnectionPolicy;
+import com.azure.cosmos.ConsistencyLevel;
+import com.azure.cosmos.CosmosClient;
+import com.azure.cosmos.CosmosClientBuilder;
+
+@Tags({"azure", "cosmos", "document", "service"})
+@CapabilityDescription(
+        "Provides a controller service that configures a connection to Azure Cosmos Document
DB (Document API or Core SQL API recently renamed) " +
+                " and provides access to that connection to other CosmosDB-related components."
+)
+public class AzureCosmosDocumentConnectionControllerService extends AbstractControllerService
implements AzureCosmosDocumentConnectionService {
+    static final String CONSISTENCY_STRONG = "STRONG";
+    static final String CONSISTENCY_BOUNDED_STALENESS= "BOUNDED_STALENESS";
+    static final String CONSISTENCY_SESSION = "SESSION";
+    static final String CONSISTENCY_CONSISTENT_PREFIX = "CONSISTENT_PREFIX";
+    static final String CONSISTENCY_EVENTUAL = "EVENTUAL";
+    private String uri;
+    private String accessKey;
+    protected CosmosClient cosmosClient;
+
+    public static final PropertyDescriptor URI = new PropertyDescriptor.Builder()
+    .name("Cosmos Document DB URI")
+    .displayName("Cosmos Document DB URI")
+    .description("CosmosURI, typically of the form: https://{databaseaccount}.documents.azure.com:443/.
Note this URI is for Cosmos DB with SQL API")
+    .required(true)
+    .addValidator(StandardValidators.NON_EMPTY_VALIDATOR)
+    .build();
+
+    public static final PropertyDescriptor DB_ACCESS_KEY = new PropertyDescriptor.Builder()
+        .name("Cosmos Document DB Access Key")
+        .displayName("Cosmos Document DB Access Key")
+        .description("Cosmos DB Access Key from Azure Portal (Settings->Keys)")
+        .required(true)
+        .addValidator(StandardValidators.NON_EMPTY_VALIDATOR)
+        .sensitive(true)
+        .build();
+
+    public static final PropertyDescriptor CONSISTENCY = new PropertyDescriptor.Builder()
+        .name("Cosmos Consistency Level")
+        .displayName("Cosmos Consistency Level")
+        .description("Cosmos Consistency Level to use")
+        .required(false)
+        .allowableValues(CONSISTENCY_STRONG, CONSISTENCY_BOUNDED_STALENESS, CONSISTENCY_SESSION,
+                CONSISTENCY_CONSISTENT_PREFIX, CONSISTENCY_EVENTUAL)
+        .defaultValue(CONSISTENCY_SESSION)
+        .addValidator(StandardValidators.NON_EMPTY_VALIDATOR)
+        .build();
+
+    @OnEnabled
+    public void onEnabled(final ConfigurationContext context) {
+        this.uri = context.getProperty(URI).getValue();
+        this.accessKey = context.getProperty(DB_ACCESS_KEY).getValue();
+        final ConsistencyLevel clevel;
+        final String selectedConsistency;
+        if(context.getProperty(CONSISTENCY).isSet()){
+            selectedConsistency = context.getProperty(CONSISTENCY).getValue();
+        }else {
+            selectedConsistency =  CONSISTENCY_SESSION;
 
 Review comment:
   And, setting the DB connection configuration and consistency has to be done either thru
a controller or processor. It is mutually exclusive. My logic is in customValidate. 
   
   And I was mentioning default value setting with PropertyDescriptor.
    
       static final PropertyDescriptor CONSISTENCY = new PropertyDescriptor.Builder()
           .name("Azure Cosmos Consistency Level")
           .displayName("Azure Cosmos Consistency Level")
           .description("Azure Cosmos Consistency Level to use")
           .required(false)
           .allowableValues(CONSISTENCY_STRONG, CONSISTENCY_BOUNDED_STALENESS, CONSISTENCY_SESSION,
                   CONSISTENCY_CONSISTENT_PREFIX, CONSISTENCY_EVENTUAL)
           .defaultValue(CONSISTENCY_SESSION)
           .addValidator(StandardValidators.NON_EMPTY_VALIDATOR)
           .build();
   
   
   
   

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