本文整理汇总了Java中org.apache.nifi.components.AllowableValue类的典型用法代码示例。如果您正苦于以下问题：Java AllowableValue类的具体用法？Java AllowableValue怎么用？Java AllowableValue使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
AllowableValue类属于org.apache.nifi.components包，在下文中一共展示了AllowableValue类的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: createResources
import org.apache.nifi.components.AllowableValue; //导入依赖的package包/类
/**
* This method creates all resources needed for the script processor to function, such as script engines,
* script file reloader threads, etc.
*/
public void createResources() {
descriptors = new ArrayList<>();
// The following is required for JRuby, should be transparent to everything else.
// Note this is not done in a ScriptEngineConfigurator, as it is too early in the lifecycle. The
// setting must be there before the factories/engines are loaded.
System.setProperty("org.jruby.embed.localvariable.behavior", "persistent");
// Create list of available engines
ScriptEngineManager scriptEngineManager = new ScriptEngineManager();
List<ScriptEngineFactory> scriptEngineFactories = scriptEngineManager.getEngineFactories();
if (scriptEngineFactories != null) {
scriptEngineFactoryMap = new HashMap<>(scriptEngineFactories.size());
List<AllowableValue> engineList = new LinkedList<>();
for (ScriptEngineFactory factory : scriptEngineFactories) {
engineList.add(new AllowableValue(factory.getLanguageName()));
scriptEngineFactoryMap.put(factory.getLanguageName(), factory);
}
// Sort the list by name so the list always looks the same.
Collections.sort(engineList, (o1, o2) -> {
if (o1 == null) {
return o2 == null ? 0 : 1;
}
if (o2 == null) {
return -1;
}
return o1.getValue().compareTo(o2.getValue());
});
AllowableValue[] engines = engineList.toArray(new AllowableValue[engineList.size()]);
SCRIPT_ENGINE = new PropertyDescriptor.Builder()
.name("Script Engine")
.required(true)
.description("The engine to execute scripts")
.allowableValues(engines)
.defaultValue(engines[0].getValue())
.required(true)
.expressionLanguageSupported(false)
.build();
descriptors.add(SCRIPT_ENGINE);
}
descriptors.add(ScriptingComponentUtils.SCRIPT_FILE);
descriptors.add(ScriptingComponentUtils.SCRIPT_BODY);
descriptors.add(ScriptingComponentUtils.MODULES);
isInitialized.set(true);
}