Question

我有一个基于EJB的应用程序，它连接到MySQL数据库并提供用于更新操作的Web UI。部署到本地WAS Liberty时，它可以正常工作。

以下是数据源的server.xml配置。

<library id="MySQLDriverLib">
    <file name="${User-defined_JDBC_DRIVER_PATH}/mysql-connector-java-5.1.38-bin.jar"/>
</library>
<dataSource id="DefaultDataSource" type="javax.sql.ConnectionPoolDataSource" transactional="true">
    <jdbcDriver libraryRef="MySQLDriverLib"/>
    <properties URL="jdbc:mysql://localhost:3306/ic16_lab2434" connectionUrl="jdbc:mysql://localhost:3306/ic16_lab2434" driver="com.mysql.jdbc.Driver" driverClass="com.mysql.jdbc.Driver" metadata="mySQL" password="object00" user="root" userName="root" />
</dataSource>
<variable name="User-defined_JDBC_DRIVER_PATH" value="C:\Software\mysql-connector-java-5.1.38"/>

正如您所看到的，它使用JDBC驱动程序jar的库，它使用path to file指定。显然，如果我尝试将EAR部署到Bluemix Liberty，这将无效。这就是我部署整个服务器目录以进行最少数量更改的原因。即使在这种情况下，我也不知道如何为数据源正确配置JDBC驱动程序库，以便服务器选择它。请帮忙。

Answer 1

如果要连接到mysql数据库并希望手动在server.xml中提供凭据，则可以执行以下操作：

server.xml中：

public class Bike {
    int speed;
    int gear;

    void changeGear(int newVal) {
        gear = newVal;
    }

    void speedUp(int newVal) {
        speed = newVal;
    }

    void breaks(int slow) {
        speed = speed + slow;
    }

    void printState() {
        System.out.println("Gear is: " + gear);
        System.out.println("Speed is: " + speed + ("MPH"));
    }
}

//________________________

public static boolean cycle = true;
public static Bike b1 = new Bike();
public static int x;
public static int y;
public static Scanner input = new Scanner(System.in);
public static int choice;

//______________________________

public static void cycling() {
    while (cycle == true) {
        System.out.println("What would you like to do now? Enter a number.");
        System.out.println("1: Speed Change");
        System.out.println("2: Change Gear");
        choice = input.nextInt();
        if (choice == 1) {
            System.out.println("Choose a speed change");
            y = input.nextInt();
            if (y < 0) {
                b1.breaks(y);
                if (b1.speed < 0) {
                    b1.speed = Math.abs(y) + y;
                    System.out.println("You've stopped entirely");
                }
            }
            if (y >= 0) {
                b1.speed = y;
                b1.printState();
                if (b1.speed >= 0 && b1.speed <= 10) {
                    while (b1.gear != 1) {
                        System.out.println("You need to be in Gear 1 for " + "that! Please change gears.");
                        x = input.nextInt();
                        b1.changeGear(x);
                    }
                    if (b1.speed >= 11 && b1.speed <= 20) {
                        while (b1.gear != 2) {
                            System.out.println("You need to be in Gear 2 for" + "that! Please change gears.");
                            x = input.nextInt();
                            b1.changeGear(x);
                        }
                        if (b1.speed >= 21) {
                            while (b1.gear != 3) {
                                System.out.println("You need to be in Gear 3 for" + "that! Please change gears.");
                                x = input.nextInt();
                                b1.changeGear(x);
                            }
                        }
             /*if(b1.speed >= 0 && b1.speed <=10){
                 b1.gear = 1;
             }else if(b1.speed >= 11 && b1.speed <=20){
                 b1.gear = 2;
             }else if(b1.speed >= 21){
                 b1.gear = 3;
             }*/
                        b1.printState();
                    }
                }
            }
        }
    }
}

在这个例子中，我将把mysql jar文件放在服务器配置目录<dataSource jndiName="jdbc/TradeDataSource"> <jdbcDriver id="mysqlDriver" libraryRef="mysql-connector" /> <properties URL="jdbc:mysql://1.2.3.4:3306/db" password="mypassword" user="admin" /> </dataSource> <library description="MySQL JDBC Driver" id="mysql-connector" name="MySQL Connector"> <fileset dir="${server.config.dir}" id="mysql-connector-jar" includes="mysql-connector-java-*.jar" /> </library>

中

您现在可以直接从defaultServer dir

wlp/usr/servers/defaultServer/mysql-connector-java-5.1.34-bin.jar

但是，自由buildpack可以自动为从Bluemix目录绑定的数据库生成server.xml数据源配置。例如，如果我创建SQLDB或ClearDB服务并将其绑定到Liberty应用程序并将服务命名为＆＃34; TradeDataSource＆＃34;，buildpack将生成配置并自动将正确的驱动程序jar添加到类路径中。

cf files yourappname app / wlp / usr / servers / defaultServer / server.xml

cf push

我现在可以使用其jndi名称查找数据源：<dataSource id='mysql-TradeDataSource' jdbcDriverRef='mysql-driver' jndiName='jdbc/TradeDataSource' transactional='true' type='javax.sql.ConnectionPoolDataSource'> <properties id='mysql-TradeDataSource-props' databaseName='${cloud.services.TradeDataSource.connection.name}' user='${cloud.services.TradeDataSource.connection.user}' password='${cloud.services.TradeDataSource.connection.password}' portNumber='${cloud.services.TradeDataSource.connection.port}' serverName='${cloud.services.TradeDataSource.connection.host}'/> <connectionManager id='mysql-TradeDataSource-conMgr' maxPoolSize='10'/> </dataSource> <jdbcDriver id='mysql-driver' javax.sql.XADataSource='org.mariadb.jdbc.MySQLDataSource' javax.sql.ConnectionPoolDataSource='org.mariadb.jdbc.MySQLDataSource' libraryRef='mysql-library'/>

Bluemix Liberty server.xml MySQL数据源配置

1 个答案: