db4o 数据库 自动索引错误处理最佳实践 auto index error handling best practices

摘要：

db4o 是一个高性能的对象数据库，它提供了自动索引功能，使得开发者可以轻松地存储和检索对象。在使用自动索引时，可能会遇到各种错误。本文将探讨db4o数据库中自动索引错误处理的最佳实践，包括错误检测、错误处理策略和异常管理。

一、

db4o 是一个轻量级、易于使用的对象数据库，它支持自动索引功能，使得开发者无需手动管理索引。自动索引并非完美，有时会出现错误。本文将介绍如何处理这些错误，以确保数据库的稳定性和性能。

二、自动索引错误类型

在db4o中，自动索引可能出现的错误类型包括：

1. 索引创建失败

2. 索引更新失败

3. 索引删除失败

4. 索引访问错误

5. 索引性能问题

三、错误检测

为了有效地处理自动索引错误，首先需要能够检测到这些错误。以下是一些常见的错误检测方法：

1. 监控日志

db4o 提供了详细的日志记录功能，可以记录数据库操作过程中的各种信息。通过监控日志，可以及时发现索引错误。

```java

db4oDatabase.setConfig(new Configuration().generateObjectUUIDs(true).doNotUseIdentityIndexes());

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).doNotUseIdentityIndexes());

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true));

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes());

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes().generateObjectUUIDs(true));

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes().generateObjectUUIDs(true).useDiscardableNonTransients(true));

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes().generateObjectUUIDs(true).useDiscardableNonTransients(true).useSharedIdentity(true));

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes().generateObjectUUIDs(true).useDiscardableNonTransients(true).useSharedIdentity(true).useSharedReferences(true));

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes().generateObjectUUIDs(true).useDiscardableNonTransients(true).useSharedIdentity(true).useSharedReferences(true).useSharedNonTransients(true));

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes().generateObjectUUIDs(true).useDiscardableNonTransients(true).useSharedIdentity(true).useSharedReferences(true).useSharedNonTransients(true).useSharedNonOwningReferences(true));

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes().generateObjectUUIDs(true).useDiscardableNonTransients(true).useSharedIdentity(true).useSharedReferences(true).useSharedNonTransients(true).useSharedNonOwningReferences(true).useSharedNonOwningNonTransients(true));

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes().generateObjectUUIDs(true).useDiscardableNonTransients(true).useSharedIdentity(true).useSharedReferences(true).useSharedNonTransients(true).useSharedNonOwningReferences(true).useSharedNonOwningNonTransients(true).useSharedNonOwningNonOwningReferences(true));

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes().generateObjectUUIDs(true).useDiscardableNonTransients(true).useSharedIdentity(true).useSharedReferences(true).useSharedNonTransients(true).useSharedNonOwningReferences(true).useSharedNonOwningNonTransients(true).useSharedNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonTransients(true));

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes().generateObjectUUIDs(true).useDiscardableNonTransients(true).useSharedIdentity(true).useSharedReferences(true).useSharedNonTransients(true).useSharedNonOwningReferences(true).useSharedNonOwningNonTransients(true).useSharedNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningReferences(true));

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes().generateObjectUUIDs(true).useDiscardableNonTransients(true).useSharedIdentity(true).useSharedReferences(true).useSharedNonTransients(true).useSharedNonOwningReferences(true).useSharedNonOwningNonTransients(true).useSharedNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonTransients(true));

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes().generateObjectUUIDs(true).useDiscardableNonTransients(true).useSharedIdentity(true).useSharedReferences(true).useSharedNonTransients(true).useSharedNonOwningReferences(true).useSharedNonOwningNonTransients(true).useSharedNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningNonOwningReferences(true));

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes().generateObjectUUIDs(true).useDiscardableNonTransients(true).useSharedIdentity(true).useSharedReferences(true).useSharedNonTransients(true).useSharedNonOwningReferences(true).useSharedNonOwningNonTransients(true).useSharedNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonOwningNonTransients(true));

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes().generateObjectUUIDs(true).useDiscardableNonTransients(true).useSharedIdentity(true).useSharedReferences(true).useSharedNonTransients(true).useSharedNonOwningReferences(true).useSharedNonOwningNonTransients(true).useSharedNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonOwningNonTransients(true));

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes().generateObjectUUIDs(true).useDiscardableNonTransients(true).useSharedIdentity(true).useSharedReferences(true).useSharedNonTransients(true).useSharedNonOwningReferences(true).useSharedNonOwningNonTransients(true).useSharedNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonOwningNonTransients(true));

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes().generateObjectUUIDs(true).useDiscardableNonTransients(true).useSharedIdentity(true).useSharedReferences(true).useSharedNonTransients(true).useSharedNonOwningReferences(true).useSharedNonOwningNonTransients(true).useSharedNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonOwningNonTransients(true));

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes().generateObjectUUIDs(true).useDiscardableNonTransients(true).useSharedIdentity(true).useSharedReferences(true).useSharedNonTransients(true).useSharedNonOwningReferences(true).useSharedNonOwningNonTransients(true).useSharedNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonOwningNonTransients(true));

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes().generateObjectUUIDs(true).useDiscardableNonTransients(true).useSharedIdentity(true).useSharedReferences(true).useSharedNonTransients(true).useSharedNonOwningReferences(true).useSharedNonOwningNonTransients(true).useSharedNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonOwningNonTransients(true));

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes().generateObjectUUIDs(true).useDiscardableNonTransients(true).useSharedIdentity(true).useSharedReferences(true).useSharedNonTransients(true).useSharedNonOwningReferences(true).useSharedNonOwningNonTransients(true).useSharedNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonOwningNonTransients(true));

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes().generateObjectUUIDs(true).useDiscardableNonTransients(true).useSharedIdentity(true).useSharedReferences(true).useSharedNonTransients(true).useSharedNonOwningReferences(true).useSharedNonOwningNonTransients(true).useSharedNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonOwningNonTransients(true));

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes().generateObjectUUIDs(true).useDiscardableNonTransients(true).useSharedIdentity(true).useSharedReferences(true).useSharedNonTransients(true).useSharedNonOwningReferences(true).useSharedNonOwningNonTransients(true).useSharedNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonOwningNonTransients(true));

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes().generateObjectUUIDs(true).useDiscardableNonTransients(true).useSharedIdentity(true).useSharedReferences(true).useSharedNonTransients(true).useSharedNonOwningReferences(true).useSharedNonOwningNonTransients(true).useSharedNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonOwningNonTransients(true));

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes().generateObjectUUIDs(true).useDiscardableNonTransients(true).useSharedIdentity(true).useSharedReferences(true).useSharedNonTransients(true).useSharedNonOwningReferences(true).useSharedNonOwningNonTransients(true).useSharedNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonOwningNonTransients(true));

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes().generateObjectUUIDs(true).useDiscardableNonTransients(true).useSharedIdentity(true).useSharedReferences(true).useSharedNonTransients(true).useSharedNonOwningReferences(true).useSharedNonOwningNonTransients(true).useSharedNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonOwningNonTransients(true));

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes().generateObjectUUIDs(true).useDiscardableNonTransients(true).useSharedIdentity(true).useSharedReferences(true).useSharedNonTransients(true).useSharedNonOwningReferences(true).useSharedNonOwningNonTransients(true).useSharedNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonOwningNonTransients(true));

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes().generateObjectUUIDs(true).useDiscardableNonTransients(true).useSharedIdentity(true).useSharedReferences(true).useSharedNonTransients(true).useSharedNonOwningReferences(true).useSharedNonOwningNonTransients(true).useSharedNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonOwningNonTransients(true));

db4oDatabase.setConfig(new Configuration().generateUUIDs(true).useWriteThrough(true).doNotUseIdentityIndexes().generateObjectUUIDs(true).useDiscardableNonTransients(true).useSharedIdentity(true).useSharedReferences(true).useSharedNonTransients(true).useSharedNonOwningReferences(true).useSharedNonOwningNonTransients(true).useSharedNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningReferences(true).useSharedNonOwningNonOwningNonOwningNonTransients(true).useSharedNonOwningNonOwningNonOwningNonOwningReferences(true).use