我正在编写一个AWS Lambda,它将处理来自CloudWatch的日志流。我正在 Java 中实现它。我正在努力解决几个问题:
import json
import base64
import zlib
def stream_gzip_decompress(stream):
dec = zlib.decompressobj(32 + zlib.MAX_WBITS) # offset 32 to skip the header
foo=''
for chunk in stream:
rv = dec.decompress(chunk)
if rv:
foo += rv
return foo
def lambda_handler(event, context):
# Decode and decompress the AWS Log stream to extract json object
stream=json.dumps(event['awslogs']['data'])
payload=json.loads(stream_gzip_decompress(stream.decode('base64')))
print(payload)
如何在Java中实现类似的功能?
错误:
{" errorMessage":"加载课程时出错 UpdateCurrentNotificationStatus:org / json / JSONException",
" errorType":" class java.lang.NoClassDefFoundError" }
以下是我写的示例代码:
import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import org.json.JSONException; import org.json.JSONObject; import com.amazonaws.services.lambda.runtime.RequestStreamHandler; import com.amazonaws.services.lambda.runtime.Context; public class UpdateCurrentNotificationStatus implements RequestStreamHandler { public void handleRequest(InputStream inputStream, OutputStream outputStream, Context context) throws IOException { int letter; while((letter = inputStream.read()) != -1) { //outputStream.write(Character.toUpperCase(letter)); JSONObject json = new JSONObject(letter); try { String stream = json.getString("awslogs"); System.out.println(stream); } catch (JSONException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } }
有人可以帮我吗?
谢谢,
普拉萨德
答案 0 :(得分:1)
您需要做的是接受CloudWatchLogsEvent作为输入参数。
public class Testing implements RequestHandler<CloudWatchLogsEvent, String> {
public String handleRequest(CloudWatchLogsEvent request, Context context){
context.getLogger().log(request.toString());
String timeStamp = new SimpleDateFormat("yyyy-MM-dd_HH:mm:ss").format(Calendar.getInstance().getTime());
context.getLogger().log("Invocation started: " + timeStamp);
context.getLogger().log(request.toString());
timeStamp = new SimpleDateFormat("yyyy-MM-dd_HH:mm:ss").format(Calendar.getInstance().getTime());
context.getLogger().log("Invocation completed: " + timeStamp);
return "completed";
}
}
请记住,这将打印编码的基本64字符串,也是gzip。你必须解码和解压缩。网上有关于如何做到这一点的例子,所以我不会深入研究。一个例如在这里Decode Base64 encoded ZIP archive (GZIP)。