TomP2P

TomP2P is an extended DHT, which stores multiple values for a key.

For every peer there is a table (either disk-based or memory-based) to store values.

A single value can be queried / updated with a secondary key.

The underlying communication framework uses Java NIO to handle many concurrent connections.

What is new in this release:

• Indirect replication fixes
• UPnP timing updates
• Peermap concurrency fixes
• Added bloom filter examples
• Many smaller fixes/improvements

What is new in version 4.4 / 5.0 Beta7:

• Indirect replication fixes
• UPnP timing updates
• Peermap concurrency fixes
• Added bloom filter examples
• Many smaller fixes/improvements

What is new in version 4.4 / 5.0 Beta4:

• Indirect replication fixes
• UPnP timing updates
• Peermap concurrency fixes
• Added bloom filter examples
• Many smaller fixes/improvements

What is new in version 4.2:

• Better MapReduce support.
• New API for put/get/add.
• JDBM 8MB fix.
• Tons of fixes/improvements.
• Update to Netty 3.5.2 and latest JDBM.

What is new in version 4.1.2-preview:

• Upgrade to latest JDBM
• Switched to logback for logging
• Added support for Bloom filters in get() and digetst()
• Better handling of "connection reset by peer"
• Fixed PeerConnection
• Improved success evaluation for futures
• Added examples for similarity search, distributed segment trees, and Bloom filters

What is new in version 4.0.7:

• Preparation for MapReduce.
• Changes for SimGrid integration.
• Potential peer discovery fix for multiple interfaces.
• TomP2P-4.0.7-dist.zip now contains all the required dependencies.

What is new in version 4.0.6:

• Timeouts for DHT operations, use Peer.setFutureTimeout() to set a timeout for any future object.
• Fixes in tracker code and peer exchange
• Exposed DistributedHashHashMap.parallelRequests() (was DistributedHashHashMap.loop()). There is an example in TestDHT.testCompareAndPut() how to use it.
• Added flag to enforce UDP or TCP for RPC calls.
• Updated to latest Netty to fix issue with Android.

What is new in version 4.0.5:

• Initial support for SimGrid.
• Fixed maintenance thread issues.
• Fixed binding bug and added testcase (connection refused).

What is new in version 4.0.4:

• An RPC for compareAndPut.
• Moved from SVN to Git. Migration complete.
• Bugfix: Add empty constructor for FutureTracker.
• Upgraded Netty to 3.3.0 with patches.

What is new in version 4.0.3:

• Cleanup and documentation of package net.tomp2p.connection.
• Fixed bug in add() that behaved as putIfAbsent.
• Classcast exception fix for Android.
• Fixed bug in handling XMLUtils, which requires to be called synchronized.
• Upgraded Netty to 3.2.7.
• Added support for digest() and digestAll().

What is new in version 4.0.1:

• Distinguish in routing between DHT and bootstrap operation to set success or failure correctly.
• New facades (PeerAddress and Peer.remove).
• Added evaluation of digest information from the routing process to make get() more efficient.
• Smaller fixes and cleanups.

What is new in version 3.2.11:

• Bug fixes:
• Endless loop in Peer.java.

What is new in version 3.2.10:

• Set default to not firewalled (no NAT testing), can be enabled with P2PConfiguration.setBehindFirewall().
• putIfAbsent() fixes. No denied message is sent back.
• PeerAddress serialization improvements, removed duplicate code from PeerAddress and MessageCodec.
• Close storage on shutdown, which caused an exception if writing still in progress.
• PeerMap can ignore firewalled peers.
• Configuration cleanup: P2PConfiguration and ConnectionConfiguration.
• Enabling more testcases (needs now -Xmx1024M).

What is new in version 3.2.9:

• Works again with Android, but be aware that NIO is broken in Harmony. Please use Gingerbread (2.3), which contains important fixes.
• Mesh-based distributed tracker improvement. Bloomfilters are used to avoid sending duplicate peers.
• Removed IP information from the packet header.
• IPv6 fixes and tested with Linux.
• Removed dead and unused code.

What is new in version 3.2.8:

• Distinguished tracker add/get, which adds itself to close trackers to place itself always on the same peers, and get() tracker, which searches for trackers close to a random id.
• Fixed signature check for entry and domain protection.
• Disabled UPNP behavior that assumes a peer is always behind a NAT. To enable it, use Bindings.setBehindFirewall(true).

What is new in version 3.2.7:

• Small UPNP fixes and example fixes, which were introduced in TomP2P 3.2.6.

What is new in version 3.2.5:

• Added support for broadcasting on layer 2. The disadvantage is that it breaks Java5 compatibility.
• pingBroadcast works with any ports (not only default ports
• Added another example how to use TomP2P.

What is new in version 3.2.4:

• Fixes in the neighbor list.
• Release management uses Maven.
• Added support for OSGi.

What is new in version 3.2.3-beta:

• Message length calculation includes header.
• Concurrent modification exception fixes.
• Testcase fixes.
• Number of peers estimation included.
• Added replication for trackers.

What is new in version 3.2.2-beta:

• Tracker performance issue fixed.
• Concurrent modifiacion exception in tracker fixed.
• Changed EvaluatingSchemeDHT due to erasure errors.
• Removed replication from trackers because this causes too much overhead.

What is new in version 3.2.1-beta:

• Caught exception for fault custom handlers.
• Updated to latest Netty (3.2.1.Final) release.