Tape is a collection of queue-related classes for Android and Java.
QueueFile is a lightning-fast, transactional, file-based FIFO. Addition and
removal from an instance is an O(1) operation and is atomic. Writes are
synchronous; data will be written to disk before an operation returns. The
underlying file is structured to survive process and even system crashes and if
an I/O exception is thrown during a mutating change, the change is aborted.
NOTE: The current implementation is built for file systems that support atomic segment writes (like YAFFS). Most conventional file systems don't support this; if the power goes out while writing a segment, the segment will contain garbage and the file will be corrupt.
ObjectQueue represents an ordering of arbitrary objects which can be backed
either by the filesystem (via
QueueFile) or in memory only.
TaskQueue is a special object queue which holds
Tasks, objects which have a
notion of being executed. Instances are managed by an external executor which
prepares and executes enqueued tasks.
Some examples are available on the website.
Download the latest JAR or grab via Maven:
<dependency> <groupId>com.squareup</groupId> <artifactId>tape</artifactId> <version>1.2.3</version> </dependency>
Snapshots of the development version are available in Sonatype's
Copyright 2012 Square, Inc. 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.
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