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Posted to issues@nifi.apache.org by GitBox <gi...@apache.org> on 2022/12/05 14:16:51 UTC
[GitHub] [nifi] Lehel44 commented on a diff in pull request #6756: NIFI-10945: Create a PostgreSQL Controller Service
Lehel44 commented on code in PR #6756:
URL: https://github.com/apache/nifi/pull/6756#discussion_r1039656518
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nifi-nar-bundles/nifi-dbcp-services-bundle/nifi-postgres-dbcp-service/src/main/java/org/apache/nifi/service/PostgreSQLConnectionPool.java:
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@@ -0,0 +1,255 @@
+/*
+ * 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.service;
+
+import org.apache.commons.lang3.StringUtils;
+import org.apache.nifi.annotation.behavior.RequiresInstanceClassLoading;
+import org.apache.nifi.annotation.documentation.CapabilityDescription;
+import org.apache.nifi.annotation.documentation.Tags;
+import org.apache.nifi.components.PropertyDescriptor;
+import org.apache.nifi.components.ValidationContext;
+import org.apache.nifi.components.ValidationResult;
+import org.apache.nifi.controller.ConfigurationContext;
+import org.apache.nifi.dbcp.AbstractDBCPConnectionPool;
+import org.apache.nifi.dbcp.KerberosContext;
+import org.apache.nifi.expression.ExpressionLanguageScope;
+import org.apache.nifi.kerberos.KerberosCredentialsService;
+import org.apache.nifi.kerberos.KerberosUserService;
+import org.apache.nifi.processor.exception.ProcessException;
+import org.apache.nifi.processor.util.StandardValidators;
+
+import java.sql.Driver;
+import java.sql.DriverManager;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+
+import static org.apache.nifi.service.JdbcUrlFormat.FULL_URL;
+import static org.apache.nifi.service.JdbcUrlFormat.PARAMETERS;
+import static org.apache.nifi.service.JdbcUrlFormat.POSTGRESQL_BASIC_URI;
+
+/**
+ * Implementation of Database Connection Pooling Service for PostgreSQL with built-in JDBC driver.
+ * Apache DBCP is used for connection pooling functionality.
+ */
+@Tags({"postgres", "postgresql", "dbcp", "jdbc", "database", "connection", "pooling", "store"})
+@CapabilityDescription("Provides PostgreSQL Connection Pooling Service with built-in JDBC driver." +
+ " Connections can be requested from the pool and returned once they have been used.")
+@RequiresInstanceClassLoading
+public class PostgreSQLConnectionPool extends AbstractDBCPConnectionPool {
+
+ public static final PropertyDescriptor CONNECTION_URL_FORMAT = new PropertyDescriptor.Builder()
+ .name("connection-url-format")
+ .displayName("Connection URL Format")
+ .description("The format of the connection URL.")
+ .allowableValues(JdbcUrlFormat.class)
+ .required(true)
+ .defaultValue(FULL_URL.getValue())
+ .build();
+
+ public static final PropertyDescriptor POSTGRES_DATABASE_URL = new PropertyDescriptor.Builder()
+ .fromPropertyDescriptor(DATABASE_URL)
+ .dependsOn(CONNECTION_URL_FORMAT, FULL_URL)
+ .build();
+
+ public static final PropertyDescriptor DATABASE_NAME = new PropertyDescriptor.Builder()
+ .name("database-name")
+ .displayName("Database Name")
+ .description("The name of the database to connect.")
+ .required(false)
+ .dependsOn(CONNECTION_URL_FORMAT, PARAMETERS)
+ .addValidator(StandardValidators.NON_EMPTY_VALIDATOR)
+ .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY)
+ .build();
+
+ public static final PropertyDescriptor DATABASE_HOSTNAME = new PropertyDescriptor.Builder()
+ .name("database-hostname")
+ .displayName("Database Hostname")
+ .description("The hostname of the database to connect.")
+ .required(false)
+ .dependsOn(CONNECTION_URL_FORMAT, PARAMETERS)
+ .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY)
+ .build();
+
+ public static final PropertyDescriptor DATABASE_PORT = new PropertyDescriptor.Builder()
+ .name("database-port")
+ .displayName("Database Port")
+ .description("The port of the database to connect.")
+ .required(false)
+ .dependsOn(CONNECTION_URL_FORMAT, PARAMETERS)
+ .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY)
+ .build();
+
+ public static final PropertyDescriptor KERBEROS_AUTH = new PropertyDescriptor.Builder()
+ .name("kerberos-auth")
+ .displayName("Kerberos Authentication")
+ .description("Use Kerberos authentication.")
+ .allowableValues("true", "false")
+ .defaultValue("false")
+ .build();
+
+ public static final PropertyDescriptor POSTGRES_KERBEROS_USER_SERVICE = new PropertyDescriptor.Builder()
+ .fromPropertyDescriptor(KERBEROS_USER_SERVICE)
+ .dependsOn(KERBEROS_AUTH, "true")
+ .build();
+
+ public static final PropertyDescriptor POSTGRES_KERBEROS_CREDENTIALS_SERVICE = new PropertyDescriptor.Builder()
+ .fromPropertyDescriptor(KERBEROS_CREDENTIALS_SERVICE)
+ .dependsOn(KERBEROS_AUTH, "true")
+ .build();
Review Comment:
That's a good idea, thanks!
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