本文整理汇总了Java中org.apache.nifi.processor.io.StreamCallback类的典型用法代码示例。如果您正苦于以下问题：Java StreamCallback类的具体用法？Java StreamCallback怎么用？Java StreamCallback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。
StreamCallback类属于org.apache.nifi.processor.io包，在下文中一共展示了StreamCallback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: onTrigger
import org.apache.nifi.processor.io.StreamCallback; //导入依赖的package包/类
@Override
public void onTrigger(final ProcessContext context, final ProcessSession session) throws ProcessException {
FlowFile flowFile = session.get();
if (flowFile == null) {
flowFile = session.create();
}
try {
flowFile.getAttributes();
flowFile = session.putAttribute(flowFile, "mime.type", "application/json");
flowFile = session.write(flowFile, new StreamCallback() {
@Override
public void process(InputStream inputStream, OutputStream outputStream) throws IOException {
Tika tika = new Tika();
String text = "";
try {
text = tika.parseToString(inputStream);
} catch (TikaException e) {
getLogger().error("Apache Tika failed to parse input " + e.getLocalizedMessage());
e.printStackTrace();
}
// TODO: wrap in JSON???
outputStream.write(text.getBytes());
}
});
session.transfer(flowFile, REL_SUCCESS);
session.commit();
} catch (final Throwable t) {
getLogger().error("Unable to process ExtractTextProcessor file " + t.getLocalizedMessage());
getLogger().error("{} failed to process due to {}; rolling back session", new Object[] { this, t });
throw t;
}
}