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Bug 878670 - Version profile information cache file. r=nalexander

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This commit is contained in:
Richard Newman 2013-06-03 10:07:43 -07:00
parent a32115ff8b
commit 08208a498c
1 changed files with 51 additions and 23 deletions
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74
mobile/android/base/background/healthreport/ProfileInformationCache.java
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@ -26,6 +26,7 @@ import org.mozilla.gecko.background.healthreport.EnvironmentBuilder.ProfileInfor
public class ProfileInformationCache implements ProfileInformationProvider {
private static final String LOG_TAG = "GeckoProfileInfo";
private static final String CACHE_FILE = "profile_info_cache.json";
public static final int FORMAT_VERSION = 1;
protected boolean initialized = false;
protected boolean needsWrite = false;
@ -51,6 +52,7 @@ public class ProfileInformationCache implements ProfileInformationProvider {
public JSONObject toJSON() {
JSONObject object = new JSONObject();
try {
object.put("version", FORMAT_VERSION);
object.put("blocklist", blocklistEnabled);
object.put("telemetry", telemetryEnabled);
object.put("profileCreated", profileCreationTime);
@ -63,11 +65,50 @@ public class ProfileInformationCache implements ProfileInformationProvider {
return object;
}
private void fromJSON(JSONObject object) throws JSONException {
blocklistEnabled = object.getBoolean("blocklist");
telemetryEnabled = object.getBoolean("telemetry");
profileCreationTime = object.getLong("profileCreated");
addons = object.optJSONObject("addons");
/**
* Attempt to restore this object from a JSON blob.
*
* @return false if there's a version mismatch or an error, true on success.
*/
private boolean fromJSON(JSONObject object) throws JSONException {
int version = object.optInt("version", 1);
switch (version) {
case FORMAT_VERSION:
blocklistEnabled = object.getBoolean("blocklist");
telemetryEnabled = object.getBoolean("telemetry");
profileCreationTime = object.getLong("profileCreated");
addons = object.optJSONObject("addons");
return true;
default:
Logger.warn(LOG_TAG, "Unable to restore from version " + version + " PIC file: expecting " + FORMAT_VERSION);
return false;
}
}
protected JSONObject readFromFile() throws FileNotFoundException, JSONException {
Scanner scanner = null;
try {
scanner = new Scanner(file, "UTF-8");
final String contents = scanner.useDelimiter("\\A").next();
return new JSONObject(contents);
} finally {
if (scanner != null) {
scanner.close();
}
}
}
protected void writeToFile(JSONObject object) throws IOException {
Logger.debug(LOG_TAG, "Writing profile information.");
Logger.pii(LOG_TAG, "Writing to file: " + file.getAbsolutePath());
FileOutputStream stream = new FileOutputStream(file);
OutputStreamWriter writer = new OutputStreamWriter(stream, Charset.forName("UTF-8"));
try {
writer.append(object.toString());
needsWrite = false;
} finally {
writer.close();
}
}
/**
@ -86,16 +127,7 @@ public class ProfileInformationCache implements ProfileInformationProvider {
throw new IOException("Couldn't serialize JSON.");
}
Logger.debug(LOG_TAG, "Writing profile information.");
Logger.pii(LOG_TAG, "Writing to file: " + file.getAbsolutePath());
FileOutputStream stream = new FileOutputStream(file);
OutputStreamWriter writer = new OutputStreamWriter(stream, Charset.forName("UTF-8"));
try {
writer.append(object.toString());
needsWrite = false;
} finally {
writer.close();
}
writeToFile(object);
}
/**
@ -118,11 +150,11 @@ public class ProfileInformationCache implements ProfileInformationProvider {
Logger.info(LOG_TAG, "Restoring ProfileInformationCache from file.");
Logger.pii(LOG_TAG, "Restoring from file: " + file.getAbsolutePath());
Scanner scanner = null;
try {
scanner = new Scanner(file, "UTF-8");
final String contents = scanner.useDelimiter("\\A").next();
fromJSON(new JSONObject(contents));
if (!fromJSON(readFromFile())) {
// No need to blow away the file; the caller can eventually overwrite it.
return false;
}
initialized = true;
needsWrite = false;
return true;
@ -130,10 +162,6 @@ public class ProfileInformationCache implements ProfileInformationProvider {
return false;
} catch (JSONException e) {
return false;
} finally {
if (scanner != null) {
scanner.close();
}
}
}