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document processes in CleanCacheService

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This breaks out each separate process into its own utility method, and adds
javadoc to describe them.
This commit is contained in:
Hans-Christoph Steiner 2016-08-16 16:50:04 +02:00
parent 0614213de0
commit 4dc1415035
2 changed files with 20 additions and 3 deletions
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21
app/src/main/java/org/fdroid/fdroid/CleanCacheService.java
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@ -23,7 +23,14 @@ import java.util.concurrent.TimeUnit;
* Handles cleaning up caches files that are not going to be used, and do not
* block the operation of the app itself. For things that must happen before
* F-Droid starts normal operation, that should go into
* {@link FDroidApp#onCreate()}
* {@link FDroidApp#onCreate()}.
* <p>
* These files should only be deleted when they are at least an hour-ish old,
* in case they are actively in use while {@code CleanCacheService} is running.
* {@link #clearOldFiles(File, long)} checks the file age using access time from
* {@link StructStat#st_atime} on {@link android.os.Build.VERSION_CODES#LOLLIPOP}
* and newer. On older Android, last modified time from {@link File#lastModified()}
* is used.
*/
public class CleanCacheService extends IntentService {
@ -58,12 +65,22 @@ public class CleanCacheService extends IntentService {
return;
}
Process.setThreadPriority(Process.THREAD_PRIORITY_LOWEST);
clearOldFiles(ApkCache.getApkCacheDir(getBaseContext()), Preferences.get().getKeepCacheTime());
deleteExpiredApksFromCache();
deleteStrayIndexFiles();
deleteOldInstallerFiles();
deleteOldIcons();
}
/**
* All downloaded APKs will be cached for a certain amount of time, which is
* specified by the user in the "Keep Cache Time" preference. This removes
* any APK in the cache that is older than that preference specifies.
*/
private void deleteExpiredApksFromCache() {
File cacheDir = ApkCache.getApkCacheDir(getBaseContext());
clearOldFiles(cacheDir, Preferences.get().getKeepCacheTime());
}
/**
* {@link org.fdroid.fdroid.installer.Installer} instances copy the APK into
* a safe place before installing. It doesn't clean up them reliably yet.

2
app/src/main/java/org/fdroid/fdroid/Preferences.java
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@ -71,7 +71,7 @@ public final class Preferences implements SharedPreferences.OnSharedPreferenceCh
private static final int DEFAULT_UPD_HISTORY = 14;
private static final boolean DEFAULT_PRIVILEGED_INSTALLER = false;
//private static final boolean DEFAULT_LOCAL_REPO_BONJOUR = true;
private static final long DEFAULT_KEEP_CACHE_TIME = TimeUnit.DAYS.toMillis(1); // one day
private static final long DEFAULT_KEEP_CACHE_TIME = TimeUnit.DAYS.toMillis(1);
private static final boolean DEFAULT_UNSTABLE_UPDATES = false;
//private static final boolean DEFAULT_LOCAL_REPO_HTTPS = false;
private static final boolean DEFAULT_INCOMP_VER = false;