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Posted to issues@nifi.apache.org by GitBox <gi...@apache.org> on 2019/04/03 20:52:59 UTC
[GitHub] [nifi] mans2singh commented on a change in pull request #3318:
NiFi-5537 Add Cypher Bundle
mans2singh commented on a change in pull request #3318: NiFi-5537 Add Cypher Bundle
URL: https://github.com/apache/nifi/pull/3318#discussion_r271927742
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File path: nifi-nar-bundles/nifi-graph-bundle/nifi-neo4j-cypher-service/src/main/java/org/apache/nifi/graph/Neo4JCypherClientService.java
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@@ -0,0 +1,311 @@
+/*
+ * 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.graph;
+
+import org.apache.commons.lang3.StringUtils;
+import org.apache.nifi.annotation.lifecycle.OnDisabled;
+import org.apache.nifi.annotation.lifecycle.OnEnabled;
+import org.apache.nifi.components.AllowableValue;
+import org.apache.nifi.components.PropertyDescriptor;
+import org.apache.nifi.controller.AbstractControllerService;
+import org.apache.nifi.controller.ConfigurationContext;
+import org.apache.nifi.expression.ExpressionLanguageScope;
+import org.apache.nifi.processor.exception.ProcessException;
+import org.apache.nifi.processor.util.StandardValidators;
+import org.apache.nifi.ssl.SSLContextService;
+import org.neo4j.driver.internal.InternalNode;
+import org.neo4j.driver.v1.AuthTokens;
+import org.neo4j.driver.v1.Config;
+import org.neo4j.driver.v1.Driver;
+import org.neo4j.driver.v1.GraphDatabase;
+import org.neo4j.driver.v1.Record;
+import org.neo4j.driver.v1.Session;
+import org.neo4j.driver.v1.StatementResult;
+import org.neo4j.driver.v1.summary.ResultSummary;
+import org.neo4j.driver.v1.summary.SummaryCounters;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+
+public class Neo4JCypherClientService extends AbstractControllerService implements GraphClientService {
+ public static final PropertyDescriptor CONNECTION_URL = new PropertyDescriptor.Builder()
+ .name("neo4j-connection-url")
+ .displayName("Neo4j Connection URL")
+ .description("Neo4J endpoing to connect to.")
+ .required(true)
+ .defaultValue("bolt://localhost:7687")
+ .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY)
+ .addValidator(StandardValidators.NON_EMPTY_VALIDATOR)
+ .build();
+
+ public static final PropertyDescriptor USERNAME = new PropertyDescriptor.Builder()
+ .name("neo4j-username")
+ .displayName("Username")
+ .description("Username for accessing Neo4J")
+ .required(true)
+ .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY)
+ .addValidator(StandardValidators.NON_BLANK_VALIDATOR)
+ .build();
+
+ public static final PropertyDescriptor PASSWORD = new PropertyDescriptor.Builder()
+ .name("neo4j-password")
+ .displayName("Password")
+ .description("Password for Neo4J user. A dummy non-blank password is required even if it disabled on the server.")
+ .required(true)
+ .sensitive(true)
+ .addValidator(StandardValidators.NON_BLANK_VALIDATOR)
+ .build();
+ public static AllowableValue LOAD_BALANCING_STRATEGY_ROUND_ROBIN = new AllowableValue(Config.LoadBalancingStrategy.ROUND_ROBIN.name(), "Round Robin", "Round Robin Strategy");
+
+ public static AllowableValue LOAD_BALANCING_STRATEGY_LEAST_CONNECTED = new AllowableValue(Config.LoadBalancingStrategy.LEAST_CONNECTED.name(), "Least Connected", "Least Connected Strategy");
+
+ protected static final PropertyDescriptor LOAD_BALANCING_STRATEGY = new PropertyDescriptor.Builder()
+ .name("neo4j-load-balancing-strategy")
+ .displayName("Load Balancing Strategy")
+ .description("Load Balancing Strategy (Round Robin or Least Connected)")
+ .required(false)
+ .defaultValue(LOAD_BALANCING_STRATEGY_ROUND_ROBIN.getValue())
+ .allowableValues(LOAD_BALANCING_STRATEGY_ROUND_ROBIN, LOAD_BALANCING_STRATEGY_LEAST_CONNECTED)
+ .build();
+
+ public static final PropertyDescriptor CONNECTION_TIMEOUT = new PropertyDescriptor.Builder()
+ .name("neo4j-max-connection-time-out")
+ .displayName("Neo4J Max Connection Time Out (seconds)")
+ .description("The maximum time for establishing connection to the Neo4j")
+ .defaultValue("5 seconds")
+ .required(true)
+ .addValidator(StandardValidators.TIME_PERIOD_VALIDATOR)
+ .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY)
+ .sensitive(false)
+ .build();
+
+ public static final PropertyDescriptor MAX_CONNECTION_POOL_SIZE = new PropertyDescriptor.Builder()
+ .name("neo4j-max-connection-pool-size")
+ .displayName("Neo4J Max Connection Pool Size")
+ .description("The maximum connection pool size for Neo4j.")
+ .defaultValue("100")
+ .required(true)
+ .addValidator(StandardValidators.POSITIVE_INTEGER_VALIDATOR)
+ .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY)
+ .sensitive(false)
+ .build();
+
+ public static final PropertyDescriptor MAX_CONNECTION_ACQUISITION_TIMEOUT = new PropertyDescriptor.Builder()
+ .name("neo4j-max-connection-acquisition-timeout")
+ .displayName("Neo4J Max Connection Acquisition Timeout")
+ .description("The maximum connection acquisition timeout.")
+ .defaultValue("60 second")
+ .required(true)
+ .addValidator(StandardValidators.TIME_PERIOD_VALIDATOR)
+ .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY)
+ .sensitive(false)
+ .build();
+
+ public static final PropertyDescriptor IDLE_TIME_BEFORE_CONNECTION_TEST = new PropertyDescriptor.Builder()
+ .name("neo4j-idle-time-before-test")
+ .displayName("Neo4J Idle Time Before Connection Test")
+ .description("The idle time before connection test.")
+ .defaultValue("60 seconds")
+ .required(true)
+ .addValidator(StandardValidators.TIME_PERIOD_VALIDATOR)
+ .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY)
+ .sensitive(false)
+ .build();
+
+ public static final PropertyDescriptor MAX_CONNECTION_LIFETIME = new PropertyDescriptor.Builder()
+ .name("neo4j-max-connection-lifetime")
+ .displayName("Neo4J Max Connection Lifetime")
+ .description("The maximum connection lifetime")
Review comment:
@mattyb149 @MikeThomsen -
Here is the reference for driver properties including max connection life time (section 2.4.3) [driver config](https://neo4j.com/docs/driver-manual/current/client-applications/#driver-configuration).
Thanks
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