JS7 JobScheduler

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Introduction

  • Usually, a user name and password are specified when connecting to a database.

  • Such configurations are considered insecure as the passwords are stored in clear text in external files or in job parameters.
  • The Oracle Wallet® provides a means to connect to an Oracle database without specifying a user account and password.

Oracle Wallet®

The Oracle Wallet® configuration is explained with the Oracle documentation:

Using Oracle Wallet® for JOC Cockpit

Usage

JS7 JOC Cockpit connects to the Oracle database without specifying a database account and password, instead, the run-time account of JOC Cockpit is used.

  • Hibernate configuration file
    • Location: $JETTY_BASE/resources/joc/hibernate.cfg.xml

    • The hibernate configuration should look like this:

      Hibernate configuration file for Oracle® database
      <?xml version="1.0" encoding="UTF-8" standalone="no"?>
<hibernate-configuration>
 <session-factory>
  <property name="hibernate.connection.driver_class">oracle.jdbc.OracleDriver</property>
  <property name="hibernate.connection.password"></property>
  <property name="hibernate.connection.url">jdbc:oracle:thin:@//oraclesrv:1521/xe</property>
  <property name="hibernate.connection.username"></property>
  <property name="hibernate.dialect">org.hibernate.dialect.Oracle12cDialect</property>
  <property name="hibernate.show_sql">false</property>
  <property name="hibernate.connection.autocommit">false</property>
  <property name="hibernate.format_sql">true</property>
  <property name="hibernate.temp.use_jdbc_metadata_defaults">false</property>
  <property name="hibernate.connection.provider_class">org.hibernate.hikaricp.internal.HikariCPConnectionProvider</property>
  <property name="hibernate.hikari.maximumPoolSize">10</property>
 </session-factory>
</hibernate-configuration>
    • Consider the empty elements that are used for the account and password. Do not delete the respective elements from the hibernate configuration file.
    • The example makes use of the Oracle® database listener running for hostname oraclesrv and port 1521. The database Service Name is xe.
    • Should you want to use a Service ID instead of a Service Name, then use this URL syntax: jdbc:oracle:thin:@oraclesrv:1521:xe
    • Should you want to directly specify additional settings as typically used from tnsnames.ora, then use this URL syntax: jdbc:oracle:thin:@(DESCRIPTION =(ADDRESS_LIST =(ADDRESS =(PROTOCOL=TCP)(HOST=oraclesrv)(PORT=1521)))(CONNECT_DATA=(SID=XE)(GLOBAL_NAME=XE.WORLD)(SERVER=DEDICATED))). 
  • Configure the location of the Oracle Wallet® by use of a Java define like this: 
    -Doracle.net.wallet_location=/home/js7/wallet. This setting should point to the directory where the wallet files of the JOC Cockpit run-time account are stored. As the database configuration for JS7 is added to the JOC Cockpit so the setting for the Oracle wallet is to be added in the JOC:
    • specify the Java define with the jettyOptions the setting of the installer response file joc_install_xml like this:
      <entry key="jettyOptions" value="-Doracle.net.wallet_location=/home/js7/wallet"/>
    • alternatively specify the JAVA_OPTIONS environment variable before running the JOC Cockpit jetty.sh start script.
    • alternatively, for Unix, create/modify and make executable the /etc/default/joc file to include the JAVA_OPTIONS environment variable like this:
      export JAVA_OPTIONS="-Doracle.net.wallet_location=/home/js7/wallet"
    • alternatively, for Unix, add the JAVA_OPTIONS environment variable to the systemd service file, see JS7 - systemd Service Files for automated Startup / Shutdown with Unix Systems

Prerequisites

  • No Oracle Client installation is required, however, you might need an Oracle Client to set up and to configure the Oracle Wallet®.
    • Typical commands to create a wallet include e.g.:
      • # create wallet in a directory that is accessible to the JOC Cockpit run-time account assumed to be "js7"
        mkstore -wrl /home/js7/wallet -create
        # add credentials to wallet; specify entry key, database account and password
        mkstore -wrl /home/js7/wallet/ -createCredential js7 some_account some_password
    • Consider that the mkstore command will add the location of the wallet to your sqlnet.ora configuration file.
      • This file is used e.g. by SQLPlus and therefore allows e.g. to execute: sqlplus /@js7 by specifying the entry key for tnsnames.ora and sqlnet.ora
      • This file is not considered when using the Oracle JDBC Driver, therefore the above Java define -Doracle.net.wallet_location has to be used.
  • JOC Cockpit makes use of the Oracle JDBC Driver:
    • Check the Oracle JDBC Driver version that ships with the JS7 release, see JS7 - Database: - Individual JDBC Driver Versions. A newer Oracle JDBC Driver might be available for download as included with the JS7 release.
    • Oracle JDBC Drivers that ship for release 18c of the DBMS are reported to work. Previous JDBC Driver releases as e.g. 12c are reported not to work with Oracle Wallet® when used by JS7.
  • The following Oracle Java libraries are required that should match the version of the Oracle JDBC Driver.
    • The .jar files are available from an Oracle Client installation and are offered by Oracle for download:
      • $ORACLE_HOME/jlib/oraclepki.jar
      • $ORACLE_HOME/jlib/osdt_cert.jar
      • $ORACLE_HOME/jlib/osdt_core.jar
    • Store the libraries in the ./lib/user_lib directory of  JOC Cockpit installation path respectively. When running JOC Cockpit for Docker® consider to store the JDBC Driver and libraries in the $JETTY_BASE/resources/joc/lib configuration directory.

Using Oracle Wallet® for Workflow Execution with Agents

Usage

Once Oracle Wallet® is configured for the account that will trigger the jobs, the account is able to connect to an Oracle database without password specification, e.g. by using sqlplus /@js7

Prerequisites

Prerequisites to execute SQL*Plus with Oracle Wallet® on Linux:

  1. Oracle Client is installed
  2. Environment variables being set: ORACLE_HOME, LD_LIBRARY_PATH=$ORACLE_HOME/lib, TNS_ADMIN

The prerequisites to execute shell scripts from JS7 Agents that call SQL*Plus with Oracle Wallet® can be met by using the Agent Instance Start Script or by using Job Resources.

Use of Agent Instance Start Script

  1. Add environment variables to the Agent Instance Start Script ./bin/agent_<port>.sh
    • ORACLE_HOME=/some_location
      LD_LIBRARY_PATH=$ORACLE_HOME/lib
      TNS_ADMIN=/some_location
      export ORACLE_HOME LD_LIBRARY_PATH TNS_ADMIN
    • This script is executed on startup of the Agent in the context of the user account that the Agent is operated for. The environment variables are forwarded to subsequent jobs in a workflow.
  2. Restart the Agent

Use of Job Resources

Instead of adding the above environment variables to the Agent's Instance Start Script, they can be added to JS7 - Job Resources which then can be assigned to the workflow or job that requires access to an Oracle database. Job Resources are the name/value pairs that can be assigned any workflow or job.

Hints

  • The Oracle Wallet® cannot be copied to other servers or to other accounts, it should be configured separately per each environment.



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