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- Have a dominant peer that is responsible for all data downloads. This eliminates the case of multiple threads fighting over download of the block chain and wasting time/bandwidth duplicating work.
- Make NetworkConnection an interface with two implementations: {TCP,Mock}NetworkConnection
- Rewrite the Peer/PeerGroup tests to use the mock connection. This simplifies testing of multiple independent peer threads within the same group.
- Switch off the MOBILE_OPTIMIZED mode as it's no longer required. It may still be useful for the multiplexing proxy project.
To get started, ensure you have the latest JDK installed, and download Maven from:
http://maven.apache.org/
Then run "mvn clean package" to compile the software. You can also run "mvn site:site" to generate a website with
useful information like JavaDocs. The outputs are under the target/ directory.
Now ensure you're running a BitCoin node locally and run the example app:
mvn exec:java -Dexec.mainClass=com.google.bitcoin.examples.PingService
It will download the block chain and eventually print a BitCoin address. If you send coins to it,
you should get them back a few minutes later when a block is solved.
Note that if you connect to a node that is itself downloading the block chain, you will see very slow progress (1
block per second or less). Find a node that isn't heavily loaded to connect to.
If you get a SocketDisconnectedException, the node you've connected to has its max send buffer set to low
(unfortunately the default is too low). Connect to a node that has a bigger send buffer,
settable by passing -maxsendbuffer=25600 to the Bitcoin C++ software.
For the convenience of Eclipse users, you can copy dependency jars to target/dependency using:
mvn dependency:copy-dependencies