118 lines
4.1 KiB
Java
118 lines
4.1 KiB
Java
/*
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* Copyright (C) 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.internal.protolog;
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import com.android.internal.protolog.common.ILogger;
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import org.json.JSONException;
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import org.json.JSONObject;
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import java.io.BufferedReader;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.util.Iterator;
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import java.util.Map;
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import java.util.TreeMap;
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import java.util.zip.GZIPInputStream;
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/**
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* Handles loading and parsing of ProtoLog viewer configuration.
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*/
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public class LegacyProtoLogViewerConfigReader {
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private static final String TAG = "ProtoLogViewerConfigReader";
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private Map<Long, String> mLogMessageMap = null;
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/** Returns message format string for its hash or null if unavailable. */
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public synchronized String getViewerString(long messageHash) {
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if (mLogMessageMap != null) {
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return mLogMessageMap.get(messageHash);
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} else {
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return null;
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}
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}
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/**
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* Reads the specified viewer configuration file. Does nothing if the config is already loaded.
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*/
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public synchronized void loadViewerConfig(ILogger logger, String viewerConfigFilename) {
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try {
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loadViewerConfig(new GZIPInputStream(new FileInputStream(viewerConfigFilename)));
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logger.log("Loaded " + mLogMessageMap.size()
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+ " log definitions from " + viewerConfigFilename);
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} catch (FileNotFoundException e) {
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logger.log("Unable to load log definitions: File "
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+ viewerConfigFilename + " not found." + e);
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} catch (IOException e) {
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logger.log("Unable to load log definitions: IOException while reading "
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+ viewerConfigFilename + ". " + e);
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} catch (JSONException e) {
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logger.log("Unable to load log definitions: JSON parsing exception while reading "
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+ viewerConfigFilename + ". " + e);
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}
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}
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/**
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* Reads the specified viewer configuration input stream.
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* Does nothing if the config is already loaded.
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*/
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public synchronized void loadViewerConfig(InputStream viewerConfigInputStream)
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throws IOException, JSONException {
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if (mLogMessageMap != null) {
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return;
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}
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InputStreamReader config = new InputStreamReader(viewerConfigInputStream);
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BufferedReader reader = new BufferedReader(config);
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StringBuilder builder = new StringBuilder();
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String line;
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while ((line = reader.readLine()) != null) {
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builder.append(line).append('\n');
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}
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reader.close();
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JSONObject json = new JSONObject(builder.toString());
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JSONObject messages = json.getJSONObject("messages");
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mLogMessageMap = new TreeMap<>();
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Iterator it = messages.keys();
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while (it.hasNext()) {
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String key = (String) it.next();
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try {
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long hash = Long.parseLong(key);
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JSONObject val = messages.getJSONObject(key);
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String msg = val.getString("message");
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mLogMessageMap.put(hash, msg);
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} catch (NumberFormatException expected) {
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// Not a messageHash - skip it
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}
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}
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}
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/**
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* Returns the number of loaded log definitions kept in memory.
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*/
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public synchronized int knownViewerStringsNumber() {
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if (mLogMessageMap != null) {
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return mLogMessageMap.size();
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}
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return 0;
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}
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}
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