Examples with IContentProvider android.content.IContentProvider used on opensource projects

Example 31 with IContentProvider

use of android.content.IContentProvider in project XobotOS by xamarin.

the class ActivityThread method acquireProvider.

public final IContentProvider acquireProvider(Context c, String name) {
    IContentProvider provider = getProvider(c, name);
    if (provider == null)
        return null;
    IBinder jBinder = provider.asBinder();
    synchronized (mProviderMap) {
        ProviderRefCount prc = mProviderRefCountMap.get(jBinder);
        if (prc == null) {
            mProviderRefCountMap.put(jBinder, new ProviderRefCount(1));
        } else {
            prc.count++;
        }
    //end else
    }
    //end synchronized
    return provider;
}

Example 32 with IContentProvider

use of android.content.IContentProvider in project android_frameworks_base by DirtyUnicorns.

the class ActivityThread method acquireExistingProvider.

public final IContentProvider acquireExistingProvider(Context c, ProviderKey key, boolean stable) {
    synchronized (mProviderMap) {
        final ProviderClientRecord pr = mProviderMap.get(key);
        if (pr == null) {
            return null;
        }
        IContentProvider provider = pr.mProvider;
        IBinder jBinder = provider.asBinder();
        if (!jBinder.isBinderAlive()) {
            // The hosting process of the provider has died; we can't
            // use this one.
            Log.i(TAG, "Acquiring provider " + key.authority + " for user " + key.userId + ": existing object's process dead");
            handleUnstableProviderDiedLocked(jBinder, true);
            return null;
        }
        // Only increment the ref count if we have one.  If we don't then the
        // provider is not reference counted and never needs to be released.
        ProviderRefCount prc = mProviderRefCountMap.get(jBinder);
        if (prc != null) {
            incProviderRefLocked(prc, stable);
        }
        return provider;
    }
}

Example 33 with IContentProvider

use of android.content.IContentProvider in project android_frameworks_base by DirtyUnicorns.

the class ActivityThread method acquireProvider.

public final IContentProvider acquireProvider(Context c, String auth, int userId, boolean stable) {
    final ProviderKey key = new ProviderKey(auth, userId);
    final IContentProvider provider = acquireExistingProvider(c, key, stable);
    if (provider != null) {
        return provider;
    }
    ProviderAcquiringCount pac;
    synchronized (mProviderMap) {
        pac = mProviderAcquiringCountMap.get(key);
        if (pac == null) {
            pac = new ProviderAcquiringCount(1);
            mProviderAcquiringCountMap.put(key, pac);
        } else {
            pac.acquiringCount++;
        }
    }
    // There is a possible race here.  Another thread may try to acquire
    // the same provider at the same time.  When this happens, we want to ensure
    // that the first one wins.
    // Note that we cannot hold the lock while acquiring and installing the
    // provider since it might take a long time to run and it could also potentially
    // be re-entrant in the case where the provider is in the same process.
    IActivityManager.ContentProviderHolder holder = null;
    synchronized (pac) {
        try {
            holder = ActivityManagerNative.getDefault().getContentProvider(getApplicationThread(), auth, userId, stable);
        } catch (RemoteException ex) {
        }
    }
    synchronized (mProviderMap) {
        if (--pac.acquiringCount == 0) {
            mProviderAcquiringCountMap.remove(key);
        }
    }
    if (holder == null) {
        Slog.e(TAG, "Failed to find provider info for " + auth);
        return null;
    }
    // Install provider will increment the reference count for us, and break
    // any ties in the race.
    holder = installProvider(c, holder, holder.info, true, /*noisy*/
    holder.noReleaseNeeded, stable);
    return holder.provider;
}

Example 34 with IContentProvider

use of android.content.IContentProvider in project android_frameworks_base by DirtyUnicorns.

the class ActivityThread method installProvider.

/**
     * Installs the provider.
     *
     * Providers that are local to the process or that come from the system server
     * may be installed permanently which is indicated by setting noReleaseNeeded to true.
     * Other remote providers are reference counted.  The initial reference count
     * for all reference counted providers is one.  Providers that are not reference
     * counted do not have a reference count (at all).
     *
     * This method detects when a provider has already been installed.  When this happens,
     * it increments the reference count of the existing provider (if appropriate)
     * and returns the existing provider.  This can happen due to concurrent
     * attempts to acquire the same provider.
     */
private IActivityManager.ContentProviderHolder installProvider(Context context, IActivityManager.ContentProviderHolder holder, ProviderInfo info, boolean noisy, boolean noReleaseNeeded, boolean stable) {
    ContentProvider localProvider = null;
    IContentProvider provider;
    if (holder == null || holder.provider == null) {
        if (DEBUG_PROVIDER || noisy) {
            Slog.d(TAG, "Loading provider " + info.authority + ": " + info.name);
        }
        Context c = null;
        ApplicationInfo ai = info.applicationInfo;
        if (context.getPackageName().equals(ai.packageName)) {
            c = context;
        } else if (mInitialApplication != null && mInitialApplication.getPackageName().equals(ai.packageName)) {
            c = mInitialApplication;
        } else {
            try {
                c = context.createPackageContext(ai.packageName, Context.CONTEXT_INCLUDE_CODE);
            } catch (PackageManager.NameNotFoundException e) {
            // Ignore
            }
        }
        if (c == null) {
            Slog.w(TAG, "Unable to get context for package " + ai.packageName + " while loading content provider " + info.name);
            return null;
        }
        try {
            final java.lang.ClassLoader cl = c.getClassLoader();
            localProvider = (ContentProvider) cl.loadClass(info.name).newInstance();
            provider = localProvider.getIContentProvider();
            if (provider == null) {
                Slog.e(TAG, "Failed to instantiate class " + info.name + " from sourceDir " + info.applicationInfo.sourceDir);
                return null;
            }
            if (DEBUG_PROVIDER)
                Slog.v(TAG, "Instantiating local provider " + info.name);
            // XXX Need to create the correct context for this provider.
            localProvider.attachInfo(c, info);
        } catch (java.lang.Exception e) {
            if (!mInstrumentation.onException(null, e)) {
                throw new RuntimeException("Unable to get provider " + info.name + ": " + e.toString(), e);
            }
            return null;
        }
    } else {
        provider = holder.provider;
        if (DEBUG_PROVIDER)
            Slog.v(TAG, "Installing external provider " + info.authority + ": " + info.name);
    }
    IActivityManager.ContentProviderHolder retHolder;
    synchronized (mProviderMap) {
        if (DEBUG_PROVIDER)
            Slog.v(TAG, "Checking to add " + provider + " / " + info.name);
        IBinder jBinder = provider.asBinder();
        if (localProvider != null) {
            ComponentName cname = new ComponentName(info.packageName, info.name);
            ProviderClientRecord pr = mLocalProvidersByName.get(cname);
            if (pr != null) {
                if (DEBUG_PROVIDER) {
                    Slog.v(TAG, "installProvider: lost the race, " + "using existing local provider");
                }
                provider = pr.mProvider;
            } else {
                holder = new IActivityManager.ContentProviderHolder(info);
                holder.provider = provider;
                holder.noReleaseNeeded = true;
                pr = installProviderAuthoritiesLocked(provider, localProvider, holder);
                mLocalProviders.put(jBinder, pr);
                mLocalProvidersByName.put(cname, pr);
            }
            retHolder = pr.mHolder;
        } else {
            ProviderRefCount prc = mProviderRefCountMap.get(jBinder);
            if (prc != null) {
                if (DEBUG_PROVIDER) {
                    Slog.v(TAG, "installProvider: lost the race, updating ref count");
                }
                // system process).
                if (!noReleaseNeeded) {
                    incProviderRefLocked(prc, stable);
                    try {
                        ActivityManagerNative.getDefault().removeContentProvider(holder.connection, stable);
                    } catch (RemoteException e) {
                    //do nothing content provider object is dead any way
                    }
                }
            } else {
                ProviderClientRecord client = installProviderAuthoritiesLocked(provider, localProvider, holder);
                if (noReleaseNeeded) {
                    prc = new ProviderRefCount(holder, client, 1000, 1000);
                } else {
                    prc = stable ? new ProviderRefCount(holder, client, 1, 0) : new ProviderRefCount(holder, client, 0, 1);
                }
                mProviderRefCountMap.put(jBinder, prc);
            }
            retHolder = prc.holder;
        }
    }
    return retHolder;
}

Example 35 with IContentProvider

use of android.content.IContentProvider in project android_frameworks_base by AOSPA.

the class SettingsCmd method run.

public void run() {
    boolean valid = false;
    String arg;
    try {
        while ((arg = nextArg()) != null) {
            if ("--user".equals(arg)) {
                if (mUser != -1) {
                    // --user specified more than once; invalid
                    break;
                }
                arg = nextArg();
                if ("current".equals(arg) || "cur".equals(arg)) {
                    mUser = UserHandle.USER_CURRENT;
                } else {
                    mUser = Integer.parseInt(arg);
                }
            } else if (mVerb == CommandVerb.UNSPECIFIED) {
                if ("get".equalsIgnoreCase(arg)) {
                    mVerb = CommandVerb.GET;
                } else if ("put".equalsIgnoreCase(arg)) {
                    mVerb = CommandVerb.PUT;
                } else if ("delete".equalsIgnoreCase(arg)) {
                    mVerb = CommandVerb.DELETE;
                } else if ("list".equalsIgnoreCase(arg)) {
                    mVerb = CommandVerb.LIST;
                } else {
                    // invalid
                    System.err.println("Invalid command: " + arg);
                    break;
                }
            } else if (mTable == null) {
                if (!"system".equalsIgnoreCase(arg) && !"secure".equalsIgnoreCase(arg) && !"global".equalsIgnoreCase(arg)) {
                    System.err.println("Invalid namespace '" + arg + "'");
                    // invalid
                    break;
                }
                mTable = arg.toLowerCase();
                if (mVerb == CommandVerb.LIST) {
                    valid = true;
                    break;
                }
            } else if (mVerb == CommandVerb.GET || mVerb == CommandVerb.DELETE) {
                mKey = arg;
                if (mNextArg >= mArgs.length) {
                    valid = true;
                } else {
                    System.err.println("Too many arguments");
                }
                break;
            } else if (mKey == null) {
                mKey = arg;
            // keep going; there's another PUT arg
            } else {
                // PUT, final arg
                mValue = arg;
                if (mNextArg >= mArgs.length) {
                    valid = true;
                } else {
                    System.err.println("Too many arguments");
                }
                break;
            }
        }
    } catch (Exception e) {
        valid = false;
    }
    if (valid) {
        try {
            IActivityManager activityManager = ActivityManagerNative.getDefault();
            if (mUser == UserHandle.USER_CURRENT) {
                mUser = activityManager.getCurrentUser().id;
            }
            if (mUser < 0) {
                mUser = UserHandle.USER_SYSTEM;
            }
            IContentProvider provider = null;
            IBinder token = new Binder();
            try {
                ContentProviderHolder holder = activityManager.getContentProviderExternal("settings", UserHandle.USER_SYSTEM, token);
                if (holder == null) {
                    throw new IllegalStateException("Could not find settings provider");
                }
                provider = holder.provider;
                switch(mVerb) {
                    case GET:
                        System.out.println(getForUser(provider, mUser, mTable, mKey));
                        break;
                    case PUT:
                        putForUser(provider, mUser, mTable, mKey, mValue);
                        break;
                    case DELETE:
                        System.out.println("Deleted " + deleteForUser(provider, mUser, mTable, mKey) + " rows");
                        break;
                    case LIST:
                        for (String line : listForUser(provider, mUser, mTable)) {
                            System.out.println(line);
                        }
                        break;
                    default:
                        System.err.println("Unspecified command");
                        break;
                }
            } finally {
                if (provider != null) {
                    activityManager.removeContentProviderExternal("settings", token);
                }
            }
        } catch (Exception e) {
            System.err.println("Error while accessing settings provider");
            e.printStackTrace();
        }
    } else {
        printUsage();
    }
}