mattyb149 commented on a change in pull request #3890: NIFI-6871: Added HikariCPConnectionPool controller service URL: https://github.com/apache/nifi/pull/3890#discussion_r347621394
########## File path: nifi-nar-bundles/nifi-standard-services/nifi-dbcp-service-bundle/nifi-dbcp-service/src/main/java/org/apache/nifi/dbcp/HikariCPConnectionPool.java ########## @@ -0,0 +1,391 @@ +/* + * 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.dbcp; + +import com.zaxxer.hikari.HikariDataSource; +import org.apache.nifi.annotation.behavior.DynamicProperty; +import org.apache.nifi.annotation.documentation.CapabilityDescription; +import org.apache.nifi.annotation.documentation.Tags; +import org.apache.nifi.annotation.lifecycle.OnDisabled; +import org.apache.nifi.annotation.lifecycle.OnEnabled; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.components.PropertyValue; +import org.apache.nifi.controller.AbstractControllerService; +import org.apache.nifi.controller.ConfigurationContext; +import org.apache.nifi.expression.AttributeExpression; +import org.apache.nifi.expression.ExpressionLanguageScope; +import org.apache.nifi.kerberos.KerberosCredentialsService; +import org.apache.nifi.processor.exception.ProcessException; +import org.apache.nifi.processor.util.StandardValidators; +import org.apache.nifi.reporting.InitializationException; +import org.apache.nifi.security.krb.KerberosAction; +import org.apache.nifi.security.krb.KerberosKeytabUser; +import org.apache.nifi.util.file.classloader.ClassLoaderUtils; + +import javax.security.auth.login.LoginException; +import java.net.MalformedURLException; +import java.sql.Connection; +import java.sql.Driver; +import java.sql.DriverManager; +import java.sql.SQLException; +import java.util.ArrayList; +import java.util.Collections; +import java.util.List; +import java.util.concurrent.TimeUnit; + +/** + * Implementation of Database Connection Pooling Service. HikariCP is used for connection pooling functionality. + */ +@Tags({"dbcp", "hikari", "jdbc", "database", "connection", "pooling", "store"}) +@CapabilityDescription("Provides Database Connection Pooling Service based on HikariCP. Connections can be asked from pool and returned after usage.") +@DynamicProperty(name = "JDBC property name", value = "JDBC property value", expressionLanguageScope = ExpressionLanguageScope.VARIABLE_REGISTRY, + description = "Specifies a property name and value to be set on the JDBC connection(s). " + + "If Expression Language is used, evaluation will be performed upon the controller service being enabled. " + + "Note that no flow file input (attributes, e.g.) is available for use in Expression Language constructs for these properties.") +public class HikariCPConnectionPool extends AbstractControllerService implements DBCPService { + + private static final String DEFAULT_TOTAL_CONNECTIONS = "0"; + private static final String DEFAULT_MAX_CONN_LIFETIME = "-1"; + + public static final PropertyDescriptor DATABASE_URL = new PropertyDescriptor.Builder() + .name("hikaricp-connection-url") + .displayName("Database Connection URL") + .description("A database connection URL used to connect to a database. May contain database system name, host, port, database name and some parameters." + + " The exact syntax of a database connection URL is specified by your DBMS.") + .defaultValue(null) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .required(true) + .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY) + .build(); + + public static final PropertyDescriptor DB_DRIVERNAME = new PropertyDescriptor.Builder() + .name("hikaricp-driver-classname") + .displayName("Database Driver Class Name") + .description("Database driver class name") Review comment: Good point, I'll update the doc ---------------------------------------------------------------- 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: [email protected] With regards, Apache Git Services
