如何从 Guvnor Web 应用程序加载特定规则 (.drl)？
例如，我在Guvnor中添加了两条规则（rule1.drl和rule2.drl）。
通常我可以通过创建一个changeset.xml来检索这些规则，例如：
<change-set ...>
<add>
<resource source='http://localhost/guvnor/org.drools.guvnor.Guvnor/package/name/LATEST.drl' type='DRL' basicAuthentication="enabled" username="username" password="password" />
</add>
</change-set>
并通过代码加载changeset.xml：
KnowledgeAgent kagent = KnowledgeAgentFactory.newKnowledgeAgent("Test Agent", kaconf);
kagent.applyChangeSet(ResourceFactory.newClassPathResource("changeset.xml"));
knowledgeBase = kagent.getKnowledgeBase();
但是我如何才能只检索特定的规则？例如rule2.drl
当然我可以将changeset.xml中的url更改为
<resource source='http://localhost/guvnor/org.drools.guvnor.Guvnor/package/name/LATEST/rule2.drl' type='DRL' basicAuthentication="enabled" username="username" password="password" />
但我发现响应文件缺少包名称和所有导入语句，例如：
package com.packname;
import namespace.EntityA;
For example, I have added two rules (rule1.drl and rule2.drl) in Guvnor.
Normally I can retrieve those rules combined by creating a changeset.xml like:
<change-set ...>
<add>
<resource source='http://localhost/guvnor/org.drools.guvnor.Guvnor/package/name/LATEST.drl' type='DRL' basicAuthentication="enabled" username="username" password="password" />
</add>
</change-set>
And load the changeset.xml by codes:
KnowledgeAgent kagent = KnowledgeAgentFactory.newKnowledgeAgent("Test Agent", kaconf);
kagent.applyChangeSet(ResourceFactory.newClassPathResource("changeset.xml"));
knowledgeBase = kagent.getKnowledgeBase();
But how I can retrieve specific rule only? e.g. rule2.drl
Of course I can change the url in changeset.xml to
<resource source='http://localhost/guvnor/org.drools.guvnor.Guvnor/package/name/LATEST/rule2.drl' type='DRL' basicAuthentication="enabled" username="username" password="password" />
But I found that the response file miss the package name and all the import statements, for example:
package com.packname;
import namespace.EntityA;
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当我们需要执行特定的 drl 包时，我们为每个包/快照使用不同的变更集。
如果规则相关，请使用不同的 pojo 来分隔规则，因为您知道管理员会从一个大 .drl 中的包中编译所有规则，如果您有一百个规则然后结束并使用迭代它，这可能会很慢不同的 pojo 实例。
When we need to execute especific drl package we use diferent changeset for each package/snapshot.
If the rules are related use different pojos for separate the rule, because you know the guvnor compile all your rules from a package in one big .drl, this could be slow if you have a hundred of rule-then-end's and iterate it with different pojo instances.
包和单个资产的 URL 模式是不同的。对于资产（例如 DRL），模式是：
The URL patterns for packages and individual assets is different. For assets (e.g. DRLs) the pattern is:
我解决此问题的方法是创建两个不同的包，一个用于rule1.drl，另一个用于rule2.drl。所以我的程序通过两个不同的变更集读取这两个规则。
My workaround to this problem is to create two different packages, one for rule1.drl and one for rule2.drl. So my program read these two rule by two different changeset.