This set of enterprise applications provides example usages of web services and message queues. The Stocks Client application is a web service which provides the ability to query stock market price and history information from a public API. The API providing the stock market information is World Trading Data. An account with World Trading Data is required in order to obtain an API key to make service calls. The Stocks Client application relays these web service events to a message queue monitored by the Operation Monitor application.
The purpose of this repository is to provide example implementations of various technologies in Java. The source code may also be a reference for JQuery, ReactJS, and MySQL as these technologies were also used in the development of these applications. Some of the Java technologies used in the source code are listed below.
a) Java Server Faces (JSF)
b) Enterprise Java Beans (EJB)
c) Java Persistence API (JPA)
d) Java API for RESTful Web Services (JAX-RS)
e) Java Message Service (JMS)
f) Java EE Security
g) Concurrency Utilities for Java EE
h) jBCrypt
Section A - requirements
Section B - build MySQL database
Section C - configuration
Section D - build application
Section E - deploy application
Section F - notes
a) Download and install MySQL Community Server 5.7 and Workbench from
http://dev.mysql.com/downloads/
b) Download and install JDK 8 from
http://www.oracle.com/technetwork/java/javase/downloads/index.html
c) Download and install NetBeans 8 IDE from
https://netbeans.org/downloads/
d) Download and install Payara Server from
https://www.payara.fish/software/downloads/
a) In Workbench, open and execute the file named "stock_search_db.sql".
a) Java Message Service
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These applications require a message queue to be established. To create the required message queue, follow the steps below.
- Start the Payara server with the asadmin script by executing "payara/bin/asadmin start-domain" from a terminal. - Once the Server has started, navigate to http://localhost:4848/ to open the Payara Console. - In Payara Admin Console, expand "Resources" and select "Connection Factories" under "JMS Resources". Add a new ConnectionFactory resource named "OperationQueueConnectionFactory". - Under "JMS Resources", select "Destination Resources" and add a new Queue resource named "OperationQueue".
b) JDBC Configuration
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To configure the database connectivity for the application, remain in the Payara Console to perform the next steps.
- Expand the "Resources" node in the Common Tasks menu and select "JDBC Connection Pools" within the "JDBC" menu option. - Click "New..." to create a new connection pool. - In the "New JDBC Connection Pool" page, enter "StockSearchPool" for the new pool name, "javax.sql.DataSource" as the resource type, and "MySql" as the database driver vendor. Click "Next". - Accept all default values by clicking "Finish". - Select the newly created connection pool from the JDBC Connection Pools page. - Select the "Additional Properties" tab and add the following properties.Name Value serverName localhost portNumber 3306 databaseName stock_search user stock_search_db_user password 7r6H5fq}dD98!@x url jdbc:mysql://localhost:3306/stock_search?serverTimezone=UTC&verifyServerCertificate=false&useSSL=false - Click on "Save" to save the new properties - In the "General" tab for this datasource, click on "Ping" to test the connection. - If the connection test is successful, proceed to "JDBC Resources" within the "JDBC" menu. - Click "New..." to create a new JDBC resource. - Enter "jdbc/stockSearch" for the JNDI Name and select "StockSearchPool" for the Pool Name. - Click "OK" to save the new resource.
c) Java EE Security
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A JDBC security realm must be established to enable container-managed security. Follow the steps below to create the security realm.
- Expand the nodes, "Configurations", "server-config", "Security", "Realms". - Click "New..." to create a new realm. - Enter "operation-monitor-realm" for Realm Name and select "com.sun.enterprise.security.auth.realm.jdbc.JDBCRealm" for Class Name. - Enter the following propertiesName Value JAAS Context jdbcRealm JNDI jdbc/stockSearch User Table OperationMonitorUser User Name Column username Password Column password Group Table UserRole Group Table User Name Column username Group Table Column role Password Encryption Algorithm none Digest Algorithm none Charset UTF-8 - Click "OK" to save this realm. The properties of this realm are displayed in the following figure.
d) API Key
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To configure the World Trading Data API key for usage by the applications, navigate to the server page in the admin console, select the "Properties" tab and "System Properties" sub-tab, and add your key with the name, "world_trading_api_token".
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After this procedure, exit Payara Console and shut down the server.
These applications are built with Maven, so all JAR dependecies are specified in the projects' pom.xml files. Each application can be built from NetBeans IDE by right-clicking the top-level project node and selecting "Clean and Build".
a) Once created in the target directories, the EAR files can be deployed to the Payara server on the "Applications" page of the admin console.
b) View the Operation Monitor application by pointing the web browser to https://localhost:8181/OperationMonitor-web for a connection with SSL/TLS implemented. Otherwise, comment out the web module security constraint in /WEB-INF/web.xml and point the browser to http://localhost:8080/OperationMonitor-web. The application, StocksClient, does not have this security constraint.
a) For the Operation Monitor, default users are provided in the database with the following credentials:
| username | password | role |
|---|---|---|
| admin1 | adminpass | administrator |
| user1 | userpass | user |
b) SSL/TLS:
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To utilize SSL/TLS on localhost, a self-signed certificate is required. With a self-signed certificate created, access the running application by SSL/TLS by pointing a web browser to https://localhost:8181/{AppName}.
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Otherwise, comment out the application's security constraint in /WEB-INF/web.xml of OperationMonitor-web and access the running application by pointing a web browser to http://localhost:8080/{AppName}.