| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.sling.tracer.internal; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.io.OutputStream; |
| import java.io.OutputStreamWriter; |
| import java.io.PrintWriter; |
| import java.io.Reader; |
| import java.io.StringWriter; |
| import java.io.UnsupportedEncodingException; |
| import java.io.Writer; |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.zip.GZIPInputStream; |
| import java.util.zip.GZIPOutputStream; |
| |
| import javax.annotation.Nonnull; |
| import javax.servlet.http.HttpServletRequest; |
| |
| import ch.qos.logback.classic.Level; |
| import com.google.common.primitives.Longs; |
| import org.apache.commons.io.IOUtils; |
| import org.apache.sling.api.request.RequestProgressTracker; |
| import org.apache.sling.commons.json.JSONException; |
| import org.apache.sling.commons.json.io.JSONWriter; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.slf4j.helpers.FormattingTuple; |
| import org.slf4j.helpers.MessageFormatter; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| |
| class JSONRecording implements Recording, Comparable<JSONRecording> { |
| private static final Logger log = LoggerFactory.getLogger(JSONRecording.class); |
| private final String method; |
| private final String requestId; |
| private final String uri; |
| private final boolean compress; |
| private final List<String> queries = new ArrayList<String>(); |
| private final List<LogEntry> logs = new ArrayList<LogEntry>(); |
| private RequestProgressTracker tracker; |
| private byte[] json; |
| private final long start = System.currentTimeMillis(); |
| private long timeTaken; |
| |
| public JSONRecording(String requestId, HttpServletRequest r, boolean compress) { |
| this.requestId = requestId; |
| this.compress = compress; |
| this.method = r.getMethod(); |
| this.uri = r.getRequestURI(); |
| } |
| |
| public boolean render(Writer w) throws IOException { |
| if (json != null) { |
| Reader r = new InputStreamReader(getInputStream(false), "UTF-8"); |
| IOUtils.copy(r, w); |
| return true; |
| } |
| return false; |
| } |
| |
| public boolean render(OutputStream os, boolean compressed) throws IOException { |
| if (json != null) { |
| IOUtils.copyLarge(getInputStream(compressed), os); |
| return true; |
| } |
| return false; |
| } |
| |
| public int size() { |
| if (json != null){ |
| return json.length; |
| } |
| return 0; |
| } |
| |
| public String getUri() { |
| return uri; |
| } |
| |
| public String getRequestId() { |
| return requestId; |
| } |
| |
| public long getTimeTaken() { |
| return timeTaken; |
| } |
| |
| public long getStart() { |
| return start; |
| } |
| |
| //~---------------------------------------< Recording > |
| |
| @Override |
| public void log(Level level, String logger, FormattingTuple tuple) { |
| Object[] params = tuple.getArgArray(); |
| if (TracerContext.QUERY_LOGGER.equals(logger) |
| && params != null && params.length == 2) { |
| queries.add((String) params[1]); |
| } |
| logs.add(new LogEntry(level, logger, tuple)); |
| } |
| |
| @Override |
| public void registerTracker(RequestProgressTracker tracker) { |
| this.tracker = tracker; |
| } |
| |
| public void done() { |
| try { |
| if (json == null) { |
| json = toJSON(); |
| |
| //Let the tracker and other references go to |
| //not occupy memory |
| tracker = null; |
| queries.clear(); |
| logs.clear(); |
| } |
| } catch (JSONException e) { |
| log.warn("Error occurred while converting the log data for request {} to JSON", requestId, e); |
| } catch (UnsupportedEncodingException e) { |
| log.warn("Error occurred while converting the log data for request {} to JSON", requestId, e); |
| } catch (IOException e) { |
| log.warn("Error occurred while converting the log data for request {} to JSON", requestId, e); |
| } |
| } |
| |
| private byte[] toJSON() throws JSONException, IOException { |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| OutputStream os = baos; |
| if (compress) { |
| os = new GZIPOutputStream(os); |
| } |
| OutputStreamWriter osw = new OutputStreamWriter(os, "UTF-8"); |
| JSONWriter jw = new JSONWriter(osw); |
| jw.setTidy(true); |
| jw.object(); |
| jw.key("method").value(method); |
| |
| timeTaken = System.currentTimeMillis() - start; |
| jw.key("time").value(timeTaken); |
| jw.key("timestamp").value(start); |
| |
| if (tracker != null) { |
| jw.key("requestProgressLogs"); |
| jw.array(); |
| Iterator<String> it = tracker.getMessages(); |
| //Per docs iterator can be null |
| while (it != null && it.hasNext()) { |
| jw.value(it.next()); |
| } |
| jw.endArray(); |
| } |
| |
| jw.key("queries"); |
| jw.array(); |
| for (String q : queries) { |
| jw.value(q); |
| } |
| jw.endArray(); |
| |
| addJson(jw, "logs", logs); |
| jw.endObject(); |
| osw.flush(); |
| os.close(); |
| return baos.toByteArray(); |
| } |
| |
| private void addJson(JSONWriter jw, String name, List<? extends JsonEntry> entries) throws JSONException { |
| jw.key(name); |
| jw.array(); |
| for (JsonEntry je : entries) { |
| jw.object(); |
| je.toJson(jw); |
| jw.endObject(); |
| } |
| jw.endArray(); |
| } |
| |
| private InputStream getInputStream(boolean compressed) throws IOException { |
| InputStream is = new ByteArrayInputStream(json); |
| |
| if (compressed) { |
| checkArgument(compress, "Cannot provide compressed response with compression disabled"); |
| return is; |
| } |
| |
| if (compress) { |
| is = new GZIPInputStream(is); |
| } |
| return is; |
| } |
| |
| @Override |
| public int compareTo(@Nonnull JSONRecording o) { |
| return Longs.compare(start, o.start); |
| } |
| |
| private interface JsonEntry { |
| void toJson(JSONWriter jw) throws JSONException; |
| } |
| |
| private static class LogEntry implements JsonEntry { |
| final Level level; |
| final String logger; |
| final FormattingTuple tuple; |
| final long timestamp = System.currentTimeMillis(); |
| |
| private LogEntry(Level level, String logger, FormattingTuple tuple) { |
| this.level = level != null ? level : Level.INFO; |
| this.logger = logger; |
| this.tuple = tuple; |
| } |
| |
| private static String toString(Object o) { |
| //Make use of Slf4j null safe toString support! |
| return MessageFormatter.format("{}", o).getMessage(); |
| } |
| |
| private static String getStackTraceAsString(Throwable throwable) { |
| StringWriter stringWriter = new StringWriter(); |
| throwable.printStackTrace(new PrintWriter(stringWriter)); |
| return stringWriter.toString(); |
| } |
| |
| @Override |
| public void toJson(JSONWriter jw) throws JSONException { |
| jw.key("timestamp").value(timestamp); |
| jw.key("level").value(level.levelStr); |
| jw.key("logger").value(logger); |
| jw.key("message").value(tuple.getMessage()); |
| |
| Object[] params = tuple.getArgArray(); |
| if (params != null) { |
| jw.key("params"); |
| jw.array(); |
| for (Object o : params) { |
| jw.value(toString(o)); |
| } |
| jw.endArray(); |
| } |
| |
| Throwable t = tuple.getThrowable(); |
| if (t != null) { |
| //Later we can look into using Logback Throwable handling |
| jw.key("exception").value(getStackTraceAsString(t)); |
| |
| } |
| } |
| } |
| |
| } |