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/*
* Copyright (C) 2009 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.os;
import android.os.DropBoxEntry;
import android.os.ParcelFileDescriptor;
/**
* Enqueues chunks of data (from various sources -- application crashes, kernel
* log records, etc.). The queue is size bounded and will drop old data if the
* enqueued data exceeds the maximum size.
*
* <p>This interface is implemented by a system service you can access:
*
* <pre>IDropBox.Stub.asInterface(ServiceManager.getService("dropbox"));</pre>
*
* <p>Other system services and debugging tools may scan the drop box to upload
* entries for processing.
*
* {@pending}
*/
interface IDropBox {
/**
* Stores human-readable text. The data may be discarded eventually (or even
* immediately) if space is limited, or ignored entirely if the tag has been
* blocked (see {@link #isTagEnabled}).
*
* @param tag describing the type of entry being stored
* @param data value to store
*/
void addText(String tag, String data);
/**
* Stores binary data. The data may be ignored or discarded as with
* {@link #addText}.
*
* @param tag describing the type of entry being stored
* @param data value to store
* @param flags describing the data, defined in {@link DropBoxEntry}
*/
void addData(String tag, in byte[] data, int flags);
/**
* Stores data read from a file descriptor. The data may be ignored or
* discarded as with {@link #addText}. You must close your
* ParcelFileDescriptor object after calling this method!
*
* @param tag describing the type of entry being stored
* @param data file descriptor to read from
* @param flags describing the data, defined in {@link DropBoxEntry}
*/
void addFile(String tag, in ParcelFileDescriptor data, int flags);
/**
* Checks any blacklists (set in system settings) to see whether a certain
* tag is allowed. Entries with disabled tags will be dropped immediately,
* so you can save the work of actually constructing and sending the data.
*
* @param tag that would be used in {@link #addText} or {@link #addFile}
* @return whether events with that tag would be accepted
*/
boolean isTagEnabled(String tag);
/**
* Gets the next entry from the drop box *after* the specified time.
* Requires android.permission.READ_LOGS.
*
* @param millis time of the last entry seen
* @return the next entry, or null if there are no more entries
*/
DropBoxEntry getNextEntry(long millis);
// TODO: It may be useful to have some sort of notification mechanism
// when data is added to the dropbox, for demand-driven readers --
// for now readers need to poll the dropbox to find new data.
}
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