【发布时间】：2015-10-27 03:53:00
【问题描述】：
我目前正在为我的实习项目构建一个项目，自从尝试在 Java 中使用 Liquibase 两天以来，我就陷入了困境。一切似乎都正确：找到了更改日志文件，正确的 URI、用户名和密码；但是当我运行它时，我的变更集没有得到处理。
我使用这个类来管理我的程序中的 liquibase 操作，例如 rollback、update、updateSQL 和 futureRollbackSQL em>，给定一个更改日志，并最终给出一个目标文件。如果源或目标来自远程服务器，我会使用 JSch 和临时文件（但这不是主题）进行一些 SSH 交互（scp to、scp from）。
这是我现在拥有的 java 代码，因为 db、user、passwd、realAction 是之前设置，changelogpath 和 dest 是一些数据存储类。
Connection c = null;
Database database = null;
PrintWriter pw = null;
File file = null;
liquibase.Liquibase liquibase = null;
contexts = db+"."+user;
try {
pw = new PrintWriter(new FileWriter(file));
// Get connection
c = SQLManager.getInstance().getConnection(db, user, passwd);
// Get liquibase connection
database = DatabaseFactory.getInstance().findCorrectDatabaseImplementation(new JdbcConnection(c));
liquibase = new liquibase.Liquibase(new DatabaseChangeLog(fsource), new FileSystemResourceAccessor(),
database);
// Run liquibase action
switch (realAction) {
case Constants.LIQUIBASE_ACTION_FUTUREROLLBACKSQL:
liquibase.futureRollbackSQL(pw);
break;
case Constants.LIQUIBASE_ACTION_UPDATESQL:
liquibase.update(contexts, pw);
break;
case Constants.LIQUIBASE_ACTION_UPDATE:
liquibase.update(contexts);
if (!c.getAutoCommit())
c.commit();
break;
default:
throw new OdewipElementRuntimeException(this, "Action not implemented");
}
pw.close();
database.close();
c.close();
} catch (IOException | SQLException | LiquibaseException e) {
throw new Exception(e.getMessage());
} finally {
if (c != null) {
try {
c.close();
} catch (SQLException e) {
// nothing to do
throw new RuntimeException(e.getClass() + ": " + e.getMessage());
}
}
}
这是我的更新日志：
<?xml version="1.0" encoding="UTF-8"?>
<databaseChangeLog
xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:ora="http://www.liquibase.org/xml/ns/dbchangelog-ext"
xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-2.0.xsd http://www.liquibase.org/xml/ns/dbchangelog-ext http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-ext.xsd">
<changeSet id="mychangeset" author="testy">
<preConditions onSqlOutput="TEST" onFail="MARK_RAN">
<not>
<tableExists tableName="abcd"/>
</not>
</preConditions>
<createTable tableName="abcd">
<column name="id" type="number">
<constraints primaryKey="true"/>
</column>
</createTable>
</changeSet>
</databaseChangeLog>
Liquibase 似乎在做一些事情，除了解析我的变更集。当我启动我的操作时，sql 生成的文件只包含 liquibase 的两个表（databasechangelog 和 databasechangeloglock）的创建，仅此而已。 update 操作根本不会修改任何内容（甚至不会创建前面提到的两个表）。我 (100%) 确定执行前数据库中不存在表 abcd。
所以我想我现在需要一些帮助，以找出什么不起作用。我试图查看 liquibase 论坛中的一些示例，但没有任何帮助。 我目前正在使用 Maven 的 liquibase 3.4.0：
<dependency>
<groupId>org.liquibase</groupId>
<artifactId>liquibase-core</artifactId>
<version>3.4.0</version>
</dependency>
是否还有我错过的其他依赖项？ 另一个小问题是如何包含一个特殊的 oracle 数据库驱动程序（ojdbc6.jar）？
感谢您的回答。
编辑 06/08/2015： 我在调试模式下获得了日志（故意更改了架构名称）：
DEBUG 06/08/15 09:28: liquibase: Executing QUERY database command: select count(*) from MYSCHEMA.DATABASECHANGELOGLOCK
DEBUG 06/08/15 09:28: liquibase: Create Database Lock Table
DEBUG 06/08/15 09:28: liquibase: Executing EXECUTE database command: CREATE TABLE MYSCHEMA.DATABASECHANGELOGLOCK (ID NUMBER(10) NOT NULL, LOCKED NUMBER(1) NOT NULL, LOCKGRANTED TIMESTAMP, LOCKEDBY VARCHAR2(255), CONSTRAINT PK_DATABASECHANGELOGLOCK PRIMARY KEY (ID))
DEBUG 06/08/15 09:28: liquibase: Created database lock table with name: MYSCHEMA.DATABASECHANGELOGLOCK
DEBUG 06/08/15 09:28: liquibase: Executing QUERY database command: select count(*) from MYSCHEMA.DATABASECHANGELOGLOCK
DEBUG 06/08/15 09:28: liquibase: Initialize Database Lock Table
DEBUG 06/08/15 09:28: liquibase: Executing EXECUTE database command: DELETE FROM MYSCHEMA.DATABASECHANGELOGLOCK
DEBUG 06/08/15 09:28: liquibase: Executing EXECUTE database command: INSERT INTO MYSCHEMA.DATABASECHANGELOGLOCK (ID, LOCKED) VALUES (1, 0)
DEBUG 06/08/15 09:28: liquibase: Executing QUERY database command: SELECT LOCKED FROM MYSCHEMA.DATABASECHANGELOGLOCK WHERE ID=1 FOR UPDATE
DEBUG 06/08/15 09:28: liquibase: Lock Database
DEBUG 06/08/15 09:28: liquibase: Executing UPDATE database command: UPDATE MYSCHEMA.DATABASECHANGELOGLOCK SET LOCKED = 1, LOCKEDBY = 'CRO09177 (xx.xx.xx.xxx)', LOCKGRANTED = to_date('2015-08-06 09:28:28', 'YYYY-MM-DD HH24:MI:SS') WHERE ID = 1 AND LOCKED = 0
INFO 06/08/15 09:28: liquibase: Successfully acquired change log lock
DEBUG 06/08/15 09:28: liquibase: Create Database Change Log Table
INFO 06/08/15 09:28: liquibase: Creating database history table with name: MYSCHEMA.DATABASECHANGELOG
DEBUG 06/08/15 09:28: liquibase: Executing EXECUTE database command: CREATE TABLE MYSCHEMA.DATABASECHANGELOG (ID VARCHAR2(255) NOT NULL, AUTHOR VARCHAR2(255) NOT NULL, FILENAME VARCHAR2(255) NOT NULL, DATEEXECUTED TIMESTAMP NOT NULL, ORDEREXECUTED NUMBER(10) NOT NULL, EXECTYPE VARCHAR2(10) NOT NULL, MD5SUM VARCHAR2(35), DESCRIPTION VARCHAR2(255), COMMENTS VARCHAR2(255), TAG VARCHAR2(255), LIQUIBASE VARCHAR2(20), CONTEXTS VARCHAR2(255), LABELS VARCHAR2(255))
DEBUG 06/08/15 09:28: liquibase: Executing QUERY database command: select count(*) from MYSCHEMA.DATABASECHANGELOG
INFO 06/08/15 09:28: liquibase: Reading from MYSCHEMA.DATABASECHANGELOG
DEBUG 06/08/15 09:28: liquibase: Executing QUERY database command: SELECT FILENAME,AUTHOR,ID,MD5SUM,DATEEXECUTED,ORDEREXECUTED,EXECTYPE,DESCRIPTION,COMMENTS,TAG,LIQUIBASE,LABELS,CONTEXTS FROM MYSCHEMA.DATABASECHANGELOG ORDER BY DATEEXECUTED ASC, ORDEREXECUTED ASC
DEBUG 06/08/15 09:28: liquibase: Executing QUERY database command: select count(*) from MYSCHEMA.DATABASECHANGELOGLOCK
DEBUG 06/08/15 09:28: liquibase: Release Database Lock
DEBUG 06/08/15 09:28: liquibase: Executing UPDATE database command: UPDATE MYSCHEMA.DATABASECHANGELOGLOCK SET LOCKED = 0, LOCKEDBY = NULL, LOCKGRANTED = NULL WHERE ID = 1
INFO 06/08/15 09:28: liquibase: Successfully released change log lock
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