michael@0: /* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko.health;
michael@0: 
michael@0: import android.content.SharedPreferences;
michael@0: import android.util.Log;
michael@0: 
michael@0: import org.mozilla.gecko.GeckoApp;
michael@0: 
michael@0: import org.json.JSONException;
michael@0: import org.json.JSONObject;
michael@0: 
michael@0: public class SessionInformation {
michael@0:     private static final String LOG_TAG = "GeckoSessInfo";
michael@0: 
michael@0:     public static final String PREFS_SESSION_START = "sessionStart";
michael@0: 
michael@0:     public final long wallStartTime;    // System wall clock.
michael@0:     public final long realStartTime;    // Realtime clock.
michael@0: 
michael@0:     private final boolean wasOOM;
michael@0:     private final boolean wasStopped;
michael@0: 
michael@0:     private volatile long timedGeckoStartup = -1;
michael@0:     private volatile long timedJavaStartup = -1;
michael@0: 
michael@0:     // Current sessions don't (right now) care about wasOOM/wasStopped.
michael@0:     // Eventually we might want to lift that logic out of GeckoApp.
michael@0:     public SessionInformation(long wallTime, long realTime) {
michael@0:         this(wallTime, realTime, false, false);
michael@0:     }
michael@0: 
michael@0:     // Previous sessions do...
michael@0:     public SessionInformation(long wallTime, long realTime, boolean wasOOM, boolean wasStopped) {
michael@0:         this.wallStartTime = wallTime;
michael@0:         this.realStartTime = realTime;
michael@0:         this.wasOOM = wasOOM;
michael@0:         this.wasStopped = wasStopped;
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Initialize a new SessionInformation instance from the supplied prefs object.
michael@0:      *
michael@0:      * This includes retrieving OOM/crash data, as well as timings.
michael@0:      *
michael@0:      * If no wallStartTime was found, that implies that the previous
michael@0:      * session was correctly recorded, and an object with a zero
michael@0:      * wallStartTime is returned.
michael@0:      */
michael@0:     public static SessionInformation fromSharedPrefs(SharedPreferences prefs) {
michael@0:         boolean wasOOM = prefs.getBoolean(GeckoApp.PREFS_OOM_EXCEPTION, false);
michael@0:         boolean wasStopped = prefs.getBoolean(GeckoApp.PREFS_WAS_STOPPED, true);
michael@0:         long wallStartTime = prefs.getLong(PREFS_SESSION_START, 0L);
michael@0:         long realStartTime = 0L;
michael@0:         Log.d(LOG_TAG, "Building SessionInformation from prefs: " +
michael@0:                        wallStartTime + ", " + realStartTime + ", " +
michael@0:                        wasStopped + ", " + wasOOM);
michael@0:         return new SessionInformation(wallStartTime, realStartTime, wasOOM, wasStopped);
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Initialize a new SessionInformation instance to 'split' the current
michael@0:      * session.
michael@0:      */
michael@0:     public static SessionInformation forRuntimeTransition() {
michael@0:         final boolean wasOOM = false;
michael@0:         final boolean wasStopped = true;
michael@0:         final long wallStartTime = System.currentTimeMillis();
michael@0:         final long realStartTime = android.os.SystemClock.elapsedRealtime();
michael@0:         Log.v(LOG_TAG, "Recording runtime session transition: " +
michael@0:                        wallStartTime + ", " + realStartTime);
michael@0:         return new SessionInformation(wallStartTime, realStartTime, wasOOM, wasStopped);
michael@0:     }
michael@0: 
michael@0:     public boolean wasKilled() {
michael@0:         return wasOOM || !wasStopped;
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Record the beginning of this session to SharedPreferences by
michael@0:      * recording our start time. If a session was already recorded, it is
michael@0:      * overwritten (there can only be one running session at a time). Does
michael@0:      * not commit the editor.
michael@0:      */
michael@0:     public void recordBegin(SharedPreferences.Editor editor) {
michael@0:         Log.d(LOG_TAG, "Recording start of session: " + this.wallStartTime);
michael@0:         editor.putLong(PREFS_SESSION_START, this.wallStartTime);
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Record the completion of this session to SharedPreferences by
michael@0:      * deleting our start time. Does not commit the editor.
michael@0:      */
michael@0:     public void recordCompletion(SharedPreferences.Editor editor) {
michael@0:         Log.d(LOG_TAG, "Recording session done: " + this.wallStartTime);
michael@0:         editor.remove(PREFS_SESSION_START);
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Return the JSON that we'll put in the DB for this session.
michael@0:      */
michael@0:     public JSONObject getCompletionJSON(String reason, long realEndTime) throws JSONException {
michael@0:         long durationSecs = (realEndTime - this.realStartTime) / 1000;
michael@0:         JSONObject out = new JSONObject();
michael@0:         out.put("r", reason);
michael@0:         out.put("d", durationSecs);
michael@0:         if (this.timedGeckoStartup > 0) {
michael@0:             out.put("sg", this.timedGeckoStartup);
michael@0:         }
michael@0:         if (this.timedJavaStartup > 0) {
michael@0:             out.put("sj", this.timedJavaStartup);
michael@0:         }
michael@0:         return out;
michael@0:     }
michael@0: 
michael@0:     public JSONObject getCrashedJSON() throws JSONException {
michael@0:         JSONObject out = new JSONObject();
michael@0:         // We use ints here instead of booleans, because we're packing
michael@0:         // stuff into JSON, and saving bytes in the DB is a worthwhile
michael@0:         // goal.
michael@0:         out.put("oom", this.wasOOM ? 1 : 0);
michael@0:         out.put("stopped", this.wasStopped ? 1 : 0);
michael@0:         out.put("r", "A");
michael@0:         return out;
michael@0:     }
michael@0: 
michael@0:     public void setTimedGeckoStartup(final long duration) {
michael@0:         timedGeckoStartup = duration;
michael@0:     }
michael@0: 
michael@0:     public void setTimedJavaStartup(final long duration) {
michael@0:         timedJavaStartup = duration;
michael@0:     }
michael@0: }