derby

I'm reading through Derby documentation and following all the instructions. I've successfully installed it (extracted it to my Linux machine and set the DERBY_HOME path). I have a complete REST API project with Angular 7 front-end and Dropwizard backend. I hard coded some data in the backend, and created all the HTTP API methods I need (GET, POST, PATCH, DELETE). The application is fully functional, but now I need to implement the Embedded version of Derby into it. I have 0 experience with such databases, and because Dropwizard gave me enough trouble already, I cannot figure out how to get

A related query I asked: How to configure & package a simple Java app to use JPA I have a simple Derby database which I can connect to via EJBs hosted in WebLogic. Now I would like to connect to it from a command line Java app using JPA. So far this Java code + persistence.xml file is throwing the error below. What am I doing wrong? My directory layout: C:. │ Registrar.class │ Registrar.java │ TxnClient.class │ TxnClient.java │ └───META-INF persistence.xml Standalone client: import javax.persistence.*; public class TxnClient { public static void main(String[] args) throws Exception {

其实，JAVA连接Derby数据库也很简单，和一般的数据库操作一样：1、加载驱动2、获取连接3、进行数据库操作4、记得关闭连接示例如下：import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; import java.util.logging.Level; import java.util.logging.Logger; public class TestDerbyServer { public static void main(String[] args) { try { Class.forName("org.apache.derby.jdbc.EmbeddedDriver");//加载驱动 Connection conn = DriverManager.getConnection("jdbc:derby:derbyDB;create=true","user","pwd"); Statement st = conn.createStatement(); ResultSet rs=st.executeQuery(" select count(*) from SYS.SYSTABLES where tablename='DBINFO' "); /

Derby是开源的、嵌入式的Java数据库程序，ij是Derby提供的客户端工具，相当于其他数据库提供的sqlplus工具。 ij是纯Java的程序，不用安装，使用起来就像运行普通的Java应用程序一样。 接下来说下：如何使用ij工具去操作数据库。 2.1利用IJ操作DERBY数据库 　　　　当你解压完derby文件时，在bin文件中存在着这些组件 　　　　 　　这些是DERBY内置的组件，你可以通过IJ去操作数据库也可以字节开启derby服务器 　　2.2 Derby是基于JDBC的，所以可以通过IJ进行简单的连接和创建，当你打开IJ时出现以下界面 　　 　　2.3通过使用connect 'jdbc:derby:dbname;create=true'; 进行创建或连接数据库，数据库将在默认路径创建数据库，当然你可以在指定路径创建数据库，只需在创建数据库名字时加上路径就行了，比如"E:/DBNAME"如下图 　　 　　2.4数据库将在指定文件创建数据库文件夹，并产生以下文件 　　 　derby为用户生成了备份和记录日志，方便用户的修改操作记录 　　2.5当你连接了一个数据库时，这说明在JVM已经存在了一个正在运行的数据库，当如果你在同一路径创建相同的数据库会产生以下信息 　　2.6接下来就是和SQL SERVER相同的建表方式 　　　　 1 create table demo

I have: BoneCP CONNECTION_POOL = ...; CONNECTION_POOL.getConfig().setJdbcUrl("jdbc:derby:database...;shutdown=true"); Connection connection = CONNECTION_POOL.getConnection(); connection.close(); CONNECTION_POOL.shutdown(); However this results in the following exception: 3274 [com.google.common.base.internal.Finalizer] ERROR com.jolbox.bonecp.ConnectionPartition - Error while closing off internal db connection java.sql.SQLException: Cannot close a connection while a transaction is still active. at org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown Source) at org.apache

Using the embedded driver I can connect to my derby database using the JDBC url: jdbc:derby:mydbname But, I usually put the full path for the db like: jdbc:derby:/Users/oreyes/dbs/mydbname Is there a way I can just specify the db name and have something like a "db_path" or something like that? I'm not an expert with derby, setting derby.system.home as described in developers guide seems to work as you expect. 来源： https://stackoverflow.com/questions/3231614/javadb-derby-path-to-database

Sorry for this (maybe) stupid question. I need to create some local DB in my java project so I've decided for Apache Derby Client. I am working with IntelliJ IDEA 13 Ultimate and my problem is that I don't know, how to create local database. Tutorials at Jetbrains websites aren't useful because there are articles only about connecting to the remote DB, not to the local one (or at least I didn't find them yet). What have I done so far: I've tried to set the DB up by creating new remote derby data source. Screenshot with the settings: DB Settings screen Username and password are the same: admin

I have a Derby database that is giving me a read-only error. The database was working fine, up until last week when disk ran out of space: Caused by: java.io.IOException: No space left on device at java.io.RandomAccessFile.writeBytes0(Native Method) at java.io.RandomAccessFile.writeBytes(RandomAccessFile.java:520) at java.io.RandomAccessFile.write(RandomAccessFile.java:550) at org.apache.derby.impl.store.raw.log.LogAccessFile.writeToLog(Unknown Source) at org.apache.derby.impl.store.raw.log.LogAccessFile.flushDirtyBuffers(Unknown Source) ... 23 more I cleaned up disk and there are 80% of disk