Playframework(16)RESTful Example
I used Playframework for sometime for scala/java. This time, I just need to upgrade the play framework version and write some RESTful API I guess to help my friends. Here are some tips:
Mysql Configuration
https://www.playframework.com/documentation/2.3.8/JavaDatabase
play framework is using boneCP I guess, not dbcp or c3p0. That is its own database connection pool which is claimed better. Here is some CONF example:
db.default.driver=com.mysql.jdbc.Driver
db.default.url="jdbc:mysql://localhost/playrest"
db.default.user=playrest
db.default.password="playrest"
db.default.logStatements=true
db.test.driver=com.mysql.jdbc.Driver
db.test.url="jdbc:mysql://localhost/test"
db.test.user=tester
db.test.password="tester"
db.test.logStatements=true
DB Migration
http://flywaydb.org/
http://sillycat.iteye.com/blog/2022462
I used flyway this time, because I am using flyway in other project. I can keep using flyway in all the projects, scala, java and etc.
One core class BaseDAO.java is as follow:
package models;
import org.flywaydb.core.Flyway;
import play.db.DB;
/**
* Created by carl on 4/1/15.
*/
public class BaseDAO {
private static Flyway initFlyway(){
Flyway flyway = new Flyway();
flyway.setDataSource(DB.getDataSource("test"));
return flyway;
}
public static void create(){
Flyway flyway = initFlyway();
flyway.migrate();
}
public static void clean(){
Flyway flyway = initFlyway();
flyway.clean();
}
}
Bean Mapper
http://stackoverflow.com/questions/15322567/how-to-transform-dbutils-resultset-into-javabeans-composited-from-more-domain-ob
I am using native SQL in DAO layer, I am not a fan of hibernate or Ebean. I prefer to directly use SQL there with the help of DBUtils. Then if the column name and property name are different, then I need to write some customer handler for bean mapping.
package models;
import java.util.Date;
public class Task {
public Long id ;
public String name;
public String desn;
public Date startDate;
public Date endDate;
}
package models;
import org.apache.commons.dbutils.BasicRowProcessor;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
/**
* Created by carl on 4/1/15.
*/
public class TaskRowProcessor extends BasicRowProcessor {
@Override
public Object toBean(ResultSet rs, Class type) throws SQLException {
Task item = new Task();
item.id = rs.getLong("ID");
item.name = rs.getString("NAME");
item.desn = rs.getString("DESN");
item.startDate = rs.getTimestamp("START_DATE");
item.endDate = rs.getTimestamp("END_DATE");
return item;
}
@Override
public <T> List<T> toBeanList(ResultSet rs, Class<T> type) throws SQLException {
List newlist = new ArrayList();
try {
while (rs.next()) {
newlist.add(toBean(rs, type));
}
} catch (SQLException ex) {
throw new RuntimeException(ex);
}
return newlist;
}
}
Using the mapping in DAO class
item = runner.query(sql,new BeanHandler<Task>(Task.class, new TaskRowProcessor()),id);
How to Do Logging
https://www.playframework.com/documentation/2.3.8/JavaLogging
https://www.playframework.com/documentation/2.3.8/ProductionConfiguration
https://www.playframework.com/documentation/2.3.8/SettingsLogger
How to Config
https://www.playframework.com/documentation/2.3.8/ProductionConfiguration
Load the config at runtime, Play will check the con directory itself
>/path/to/bin/project-name -Dconfig.resource=application-local.conf
Play will load the file from directory
>/path/to/bin/project-name -Dconfig.file=/etc/conf/application-local.conf
Play will load the content from remote
>/path/to/bin/project-name -Dconfig.url=http://conf.sillycat.com/conf/application-local.conf
How to Run the Test class
https://www.playframework.com/documentation/2.3.8/JavaTest
https://www.playframework.com/documentation/2.3.8/JavaFunctionalTest
> activator "testOnly models.*"
Or
Entry the activator env first
> [sillycat-playrest] $ testOnly models.TaskDAOTest
The sample project is named sillycat-playrest.
References:
java8
http://www.jooq.org/java-8-and-sql
playframework doc
https://www.playframework.com/documentation/2.3.x/JavaDatabase
dbutils
http://tianyongwei.logdown.com/posts/243610-commons-dbutils
http://aofengblog.blog.163.com/blog/static/63170212014510105657292/
http://wallimn.iteye.com/blog/1606930
http://commons.apache.org/proper/commons-dbutils/examples.html
writing test
https://www.playframework.com/documentation/2.3.8/JavaTest
Playframework(16)RESTful Example
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转载自sillycat.iteye.com/blog/2199668
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