Difference between revisions of "NexJ Express Connecting to PostgreSQL"

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<big><big> PostgreSQL Adapter for NexJ - Create Test Environment </big></big>
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{{Admon/obsolete}}
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{{NexJ_Express Index}}
 
  
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=== 1- Setup the postgresql-connection ===
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[[category: NexJ Express PostgreSQL]][[Category:NexJ_Express_Development]][[category: NexJ Express]]
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For testing the connection, the 'PostgreSQLAdapterTest.java' is being used.
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* [[PostgreSQL_Adapter-nexj/test-env/todo |TODOs]]
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== Task Summary ==
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* Files to configure based on PostgreSQL properties
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{| border="1" cellpadding="4" cellspacing="2" style="border: 1px solid black;border-collapse:collapse;"
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: src
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|-
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:: PostgreSQLAdapter.java  // Extends SQLAdapter.java  - SQL Persistence adapter
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! Task
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:: PostgreSQLSchemaManager.java  // Extends SQLSchemaManager.java - class for reading, creating and upgrading the database schema
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! Status
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:: system.dstype
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|-
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:: DatabaseTool.java // This file calles SQLSchemaMangerFactory.java and creates the connection
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| Install the PostgreSQL Server
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:: RelationalDatabase.java // Sets the default properties for the supported drivers
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| DONE
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:: RelationalDatabaseFragment.java // Sets the custom fragment properties for the supported drivers
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|-
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:: Driver type and some other properties in JDBCInfo.java
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| Install PostgreSQL driver
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:: SQLSchemaManagerFactory.java
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| DONE
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: test
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|-
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:: AllTests.java
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| Add code to connect to server
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:: PostgreSQLAdapterTest.java  // Extends SQLAdapterTest.java
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| DONE
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:: PostgreSQLSchemaManagerTest.java  // Extends SQLSchemaManagerTest.java
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|-
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:: default.config  // System resources are being extracted from these 4 XML files
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| Create Script for Test database
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:: postgresql.connection
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| DONE
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:: filestorage.connections
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|-
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::filestoragefragment.connections
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| Test connection to the server
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: Script - scripts are being processed through SQLDataTest.java
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| DONE
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:: postgresql_setup.sql
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|-
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:: TO be cond'
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| Configure UnitTests for multiple DB's
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|
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|}
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 +
== Task Details ==
 +
=== Install PostgreSQL ===
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Download: <code>Version 9.0</code> from list of [http://www.enterprisedb.com/products/pgdownload.do#windows PostgreSQL downloads].
 +
 
 +
=== Install PostgreSQL JDBC3 driver ===
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Download: <code> JDBC3 Postgresql Driver, Version 9.0-801 </code> @ http://jdbc.postgresql.org/download.html
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<br/>Install: Copy driver to <code>[jdk folder]/jre/lib/ext</code>
 +
 
 +
=== Code: Add PostgreSQL Driver ===
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Package: <code>nexj.core.persistance.sql</code>
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:Create <code>PostgreSQLAdapter.java</code> by extending <code>SQLAdapter</code>
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:Create <code>PostgreSQLSchemaManager.java</code> by extending <code>SQLSchemaManager</code>
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:Edit <code>RelationalDatabase.java</code>
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:Edit <code>RelationalDatabaseFragment.java</code>
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:Edit <code>SQLSchemaManagerFactory.java</code>
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Package: <code>nexj.core.meta.sys</code>
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:Edit <code>system.dstypes</code>
 +
 
 +
=== SQL Scripts ===
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Package: <code>nexj.core.persistence.sql.script</code>
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:Create
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* <code>postgresql_setup.sql</code>
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* <code>postgresql_drop.sql</code>
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* <code>postgresql_insert.sql</code>
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* <code>postgresql_upd_addr.sql</code>
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* <code>postgresql_upd_cont.sql</code>
 +
 
 +
=== UnitTest: Test Connectivity to database ===
 +
Package: <code>nexj.core.persistance.sql</code>
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:Create <code>PostgreSQLAdapterTest.java</code> by extending <code>SQLAdapterTest</code>
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:Create <code>PostgreSQLSchemaManagerTest.java</code> by extending <code>SQLSchemaManagerTest</code>
 +
 
 +
Package: <code>nexj</code>
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:Create <code>postgresql.connections</code> using NexJ Studio
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:Edit <code>default.config</code> to use PostgreSQL
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:Edit all <code>*.connections</code> files to use PostgreSQL
 +
 
 +
===Configure UnitTests for more than one Database===
  
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* NOTES
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<!--
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: Installed the <code> JDBC3 Postgresql Driver, Version 9.0-801 </code> and added it to the libraries in JDK
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== Setup the postgresql-connection ==
 +
For testing the connection, the 'AllTests.java' is being used.
 +
: Installed the <code> Installer version Version 9.0.1-1</code> from list of [http://www.enterprisedb.com/products/pgdownload.do#windows PostgreSQL downloads].
 +
: Installed the <code> JDBC3 Postgresql Driver, Version 9.0-801 </code> @ http://jdbc.postgresql.org/download.html and added it to the libraries in JDK
 
:: The driver class which is being used for NexJ Express Model is: <code> org.postgresql.xa.PGXADataSource </code>
 
:: The driver class which is being used for NexJ Express Model is: <code> org.postgresql.xa.PGXADataSource </code>
 
:: The driver is loaded from RelationalDatabaseFragment.java and RelationalDatabase.java
 
:: The driver is loaded from RelationalDatabaseFragment.java and RelationalDatabase.java
Line 47: Line 92:
 
       props.setProperty(XMLMetadataLoader.CONNECTIONS_URL_PROPERTY, "/nexj/" + sAdapter.toLowerCase(Locale.ENGLISH) + ".connections");  // sets the properties to postgresql.connection
 
       props.setProperty(XMLMetadataLoader.CONNECTIONS_URL_PROPERTY, "/nexj/" + sAdapter.toLowerCase(Locale.ENGLISH) + ".connections");  // sets the properties to postgresql.connection
 
</source>
 
</source>
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: After all properties are loaded, it creates the connection through Connection Factory files.
  
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=== 2- Create a PostgreSQL database through some scripts===
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===Files to Configure===
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: Through the process in postgresql_setup.sql, the database was created, initialized and tested:
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'''NOTE''': Changes to these files are involved with '''1-Port''', which should be: 5432, and '''2- Driver package''' that should change to  <code> org.postgresql.xa.PGXADataSource </code>
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:: A database called 'test is created in PostgreSQL : <code> CREATE DATABASE test </code>
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: src
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:: To create a <code>user</code> along with <code>password</code>: <code> CREATE USER test WITH PASSWORD 'test'; </code>
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:: system.dstype
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:: Login to the database 'test' with username 'test': <code> psql -U test test </code>
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:: DatabaseTool.java  // This file calles SQLSchemaMangerFactory.java and creates the connection
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:: Create a <code> Schema </code> called 'test' inside the database 'test' with particular owner 'test': <code> CREATE SCHEMA test AUTHORIZATION test;</code>
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:: RelationalDatabase.java // Sets the default properties for the supported drivers
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:: Create a <code>table</code> called 'Mutex' with primary key: <code> CREATE TABLE test.Mutex(id INT PRIMARY KEY); </code>
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:: RelationalDatabaseFragment.java // Sets the custom fragment properties for the supported drivers
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:: Insert a value into the primary key: <code> INSERT INTO test.Mutex(id) VALUES (1); </code>
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:: Driver type and some other properties in JDBCInfo.java
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:: SQLSchemaManagerFactory.java  // Sets the connection for the particular adapter type
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: test
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:: AllTests.java
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:: default.config  // change to these four files are: adapter="PostgreSQL" port="5432"
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:: postgresql.connection
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:: filestorage.connections
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::filestoragefragment.connections
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-->

Latest revision as of 20:30, 26 January 2014

Important.png
This page may be obsolete.
It contains historical information.

Task Summary

Task Status
Install the PostgreSQL Server DONE
Install PostgreSQL driver DONE
Add code to connect to server DONE
Create Script for Test database DONE
Test connection to the server DONE
Configure UnitTests for multiple DB's

Task Details

Install PostgreSQL

Download: Version 9.0 from list of PostgreSQL downloads.

Install PostgreSQL JDBC3 driver

Download: JDBC3 Postgresql Driver, Version 9.0-801 @ http://jdbc.postgresql.org/download.html
Install: Copy driver to [jdk folder]/jre/lib/ext

Code: Add PostgreSQL Driver

Package: nexj.core.persistance.sql

Create PostgreSQLAdapter.java by extending SQLAdapter
Create PostgreSQLSchemaManager.java by extending SQLSchemaManager
Edit RelationalDatabase.java
Edit RelationalDatabaseFragment.java
Edit SQLSchemaManagerFactory.java

Package: nexj.core.meta.sys

Edit system.dstypes

SQL Scripts

Package: nexj.core.persistence.sql.script

Create
  • postgresql_setup.sql
  • postgresql_drop.sql
  • postgresql_insert.sql
  • postgresql_upd_addr.sql
  • postgresql_upd_cont.sql

UnitTest: Test Connectivity to database

Package: nexj.core.persistance.sql

Create PostgreSQLAdapterTest.java by extending SQLAdapterTest
Create PostgreSQLSchemaManagerTest.java by extending SQLSchemaManagerTest

Package: nexj

Create postgresql.connections using NexJ Studio
Edit default.config to use PostgreSQL
Edit all *.connections files to use PostgreSQL

Configure UnitTests for more than one Database

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