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From joshelser <...@git.apache.org>
Subject [GitHub] accumulo pull request #242: ACCUMULO-2181/3005 REST API and new Monitor UI
Date Thu, 06 Apr 2017 04:35:54 GMT
Github user joshelser commented on a diff in the pull request:

    https://github.com/apache/accumulo/pull/242#discussion_r110075373
  
    --- Diff: server/monitor/src/main/java/org/apache/accumulo/monitor/rest/logs/LogResource.java
---
    @@ -0,0 +1,79 @@
    +/*
    + * 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.accumulo.monitor.rest.logs;
    +
    +import java.util.ArrayList;
    +import java.util.List;
    +
    +import javax.ws.rs.GET;
    +import javax.ws.rs.POST;
    +import javax.ws.rs.Path;
    +import javax.ws.rs.Produces;
    +import javax.ws.rs.core.MediaType;
    +
    +import org.apache.accumulo.server.monitor.DedupedLogEvent;
    +import org.apache.accumulo.server.monitor.LogService;
    +import org.apache.log4j.spi.LoggingEvent;
    +
    +/**
    + *
    + * Responsible for generating a new log JSON object
    + *
    + * @since 2.0.0
    + *
    + */
    +@Path("/logs")
    +@Produces({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
    +public class LogResource {
    +
    +  /**
    +   * Generates log event list as a JSON object
    +   *
    +   * @return log event array
    +   */
    +  @GET
    +  public List<LogEvent> getRecentLogs() {
    +    List<DedupedLogEvent> dedupedLogEvents = LogService.getInstance().getEvents();
    +    ArrayList<LogEvent> logEvents = new ArrayList<>(dedupedLogEvents.size());
    +
    +    final StringBuilder msg = new StringBuilder(64);
    +    for (DedupedLogEvent dev : dedupedLogEvents) {
    +      msg.setLength(0);
    +      final LoggingEvent ev = dev.getEvent();
    +      Object application = ev.getMDC("application");
    +      if (application == null)
    +        application = "";
    +
    +      msg.append(ev.getMessage().toString());
    +      if (ev.getThrowableStrRep() != null)
    +        for (String line : ev.getThrowableStrRep())
    +          msg.append("\n\t").append(line);
    +
    +      // Add a new log event to the list
    +      logEvents.add(new LogEvent(ev.getTimeStamp(), application, dev.getCount(), ev.getLevel().toString(),
msg.toString().trim()));
    --- End diff --
    
    the `trim()` seems unnecessary at a glance.


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