本文介绍了在SymmetricDS Embedded中创建SYM表的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我正在尝试在使用H2数据库的Java应用程序中嵌入对称 3.7.该应用程序是一个客户端节点,并使用SymmetricDS API中的类ClientSymmetricEngine.

I'm trying to embedded Symmetricds 3.7 in a java application which uses H2 database. The application is a client node and uses the class ClientSymmetricEngine from SymmetricDS API.

主节点运行独立的对称服务器,当我使用应用程序中先前测试中已配置的数据库时,我能够同步数据.

The master node runs standalone symmetricds server and I was able to synchronize the data when I used an already configured databsae from previous tests in the application.

在新数据库上运行应用程序时,它将引发以下异常:

When running the application on a new database, it throws this exception:

java.lang.IllegalStateException: This node has not been configured.Could not find a row in the identity table
at 
org.jumpmind.symmetric.service.impl.RegistrationService.openRegistration(RegistrationService.java:562)
at 
org.jumpmind.symmetric.service.impl.RegistrationService.openRegistration(RegistrationService.java:530)
at 
org.jumpmind.symmetric.service.impl.RegistrationService.openRegistration(RegistrationService.java:519)
at 
org.jumpmind.symmetric.AbstractSymmetricEngine.openRegistration(AbstractSymmetricEngine.java:890)
at syncdemo.ClientNode.<init>(ClientNode.java:32)
at syncdemo.SyncDemo.main(SyncDemo.java:37)

如何通过API在客户端节点中创建SYM表?

How do I create SYM Tables in the client node through the API?

我从此处获得了用于同步的代码.在ClientNode类中使用的方法如下:

I got the code for syncing from here. Which is being used in the ClientNode class as follows:

public class ClientNode {
private ClientSymmetricEngine cEngine;
private File propFile;


public ClientNode(File file) throws FileNotFoundException, IOException {
    propFile = file;
    Properties propertiesFile = new Properties();
    propertiesFile.load(new FileReader(propFile));
    cEngine = new ClientSymmetricEngine(propertiesFile, true);
    getcEngine().openRegistration("store", "001");
    getcEngine().setup();
    getcEngine().start();
}

public ClientSymmetricEngine getcEngine() {
    return cEngine;
}

public void setcEngine(ClientSymmetricEngine cEngine) {
    this.cEngine = cEngine;
}
}

从此处调用clientNode类:

Calling clientNode class from here:

public class SyncDemo {       

public static void main(String[] args) {

      try 
        {
        new ClientNode(new File("/client.properties"));
        }
        catch (Exception e) 
        {
        e.printStackTrace();
        }

}
}

client.properties文件的内容:

Content of client.properties file:

external.id=001
engine.name=store-001
sync.url=http://192.168.1.107:31415/sync/corp-000
group.id=store
db.url=jdbc:h2:./syncdata/store001;AUTO_SERVER=TRUE;LOCK_TIMEOUT=60000
db.driver=org.h2.Driver
db.user=symmetric
registration.url=http://192.168.1.107:31415/sync/corp-000
db.password=
auto.config.database=true  

我刚刚注意到,即使客户端节点数据库中存在SYM表,也将引发相同的异常,除非在SYM_NODE和SYM_NODE_IDENTITY表中插入了适当的数据.

I just noticed that even if the SYM Tables are present in the client node's database, same exception is thrown unless appropriate data is inserted in SYM_NODE and SYM_NODE_IDENTITY tables.

推荐答案

接受的答案对我不起作用,我仍然遇到相同的错误.我结合了已接受答案中的更改以及理解,一起工作了:

The accepted answer did not work for me, I still got the same error. I got it working with a combination of the change in the accepted answer, plus understanding:

  1. 每个客户端节点上的sync.url在注册时来自服务器.
  2. registration.url告诉客户端节点在哪里可以找到配置(主)节点.
  3. 如果您过去曾经搞砸过任何一个,则sym_表中的某些内容将被弄乱.您最好清除数据库并重新启动.
  4. 不会在嵌入式应用程序中自动填充sym_表.您必须手动填充它们. .../samples/insert_sample.sql文件是您的朋友.
  1. the sync.url on each client node comes from the server at registration time.
  2. the registration.url tells the client nodes where to find the configuration (master) node.
  3. If you've ever screwed either of those up in the past, something in your sym_ tables is messed up. You're probably better off wiping your database and starting again.
  4. the sym_ tables are not auto-populated for you in an embedded app. You must manually populate them. The .../samples/insert_sample.sql file is your friend.

这篇关于在SymmetricDS Embedded中创建SYM表的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

10-29 19:21