com.continuuity.weave.internal.logging.LogEntryDecoder.java Source code

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Here is the source code for com.continuuity.weave.internal.logging.LogEntryDecoder.java

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/*
 * Copyright 2012-2013 Continuuity,Inc. All Rights Reserved.
 *
 * Licensed 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 com.continuuity.weave.internal.logging;

import com.continuuity.weave.api.logging.LogEntry;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;

import java.lang.reflect.Type;

/**
 * A {@link com.google.gson.Gson} decoder for {@link LogEntry}.
 */
public final class LogEntryDecoder implements JsonDeserializer<LogEntry> {

    @Override
    public LogEntry deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
            throws JsonParseException {
        if (!json.isJsonObject()) {
            return null;
        }
        JsonObject jsonObj = json.getAsJsonObject();

        final String name = jsonObj.get("name").getAsString();
        final String host = jsonObj.get("host").getAsString();
        final long timestamp = Long.parseLong(jsonObj.get("timestamp").getAsString());
        final LogEntry.Level level = LogEntry.Level.valueOf(jsonObj.get("level").getAsString());
        final String className = jsonObj.get("className").getAsString();
        final String method = jsonObj.get("method").getAsString();
        final String file = jsonObj.get("file").getAsString();
        final String line = jsonObj.get("line").getAsString();
        final String thread = jsonObj.get("thread").getAsString();
        final String message = jsonObj.get("message").getAsString();

        final StackTraceElement[] stackTraces = context.deserialize(jsonObj.get("stackTraces").getAsJsonArray(),
                StackTraceElement[].class);

        return new LogEntry() {
            @Override
            public String getLoggerName() {
                return name;
            }

            @Override
            public String getHost() {
                return host;
            }

            @Override
            public long getTimestamp() {
                return timestamp;
            }

            @Override
            public Level getLogLevel() {
                return level;
            }

            @Override
            public String getSourceClassName() {
                return className;
            }

            @Override
            public String getSourceMethodName() {
                return method;
            }

            @Override
            public String getFileName() {
                return file;
            }

            @Override
            public int getLineNumber() {
                if (line.equals("?")) {
                    return -1;
                } else {
                    return Integer.parseInt(line);
                }
            }

            @Override
            public String getThreadName() {
                return thread;
            }

            @Override
            public String getMessage() {
                return message;
            }

            @Override
            public StackTraceElement[] getStackTraces() {
                return stackTraces;
            }
        };
    }
}