openethereum/parity-clib/examples/java/Main.java

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parity-clib: `async C bindings to RPC requests` + `subscribe/unsubscribe to websocket events` (#9920) * feat(parity-clib asynchronous rpc queries) * feat(seperate bindings for ws and rpc) * Subscribing to websockets for the full-client works * feat(c binding unsubscribe_from_websocket) * fix(tests): tweak CMake build config * Enforce C+11 * refactor(parity-cpp-example) : `cpp:ify` * fix(typedefs) : revert typedefs parity-clib * docs(nits) * fix(simplify websocket_unsubscribe) * refactor(cpp example) : more subscriptions * fix(callback type) : address grumbles on callback * Use it the example to avoid using global variables * docs(nits) - don't mention `arc` * fix(jni bindings): fix compile errors * feat(java example and updated java bindings) * fix(java example) : run both full and light client * fix(Java shutdown) : unsubscribe to sessions Forgot to pass the JNIEnv environment since it is an instance method * feat(return valid JString) * Remove Java dependency by constructing a valid Java String in the callback * fix(logger) : remove `rpc` trace log * fix(format) * fix(parity-clib): remove needless callback `type` * fix(parity-clib-examples) : update examples * `cpp` example pass in a struct instead to determines `callback kind` * `java` add a instance variable the class `Callback` to determine `callback kind` * fix(review comments): docs and format * Update parity-clib/src/java.rs Co-Authored-By: niklasad1 <niklasadolfsson1@gmail.com> * fix(bad merge + spelling) * fix(move examples to parity-clib/examples)
2019-01-02 16:49:01 +01:00
// Copyright 2018 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
import java.util.Vector;
import java.util.concurrent.atomic.AtomicInteger;
import io.parity.ethereum.Parity;
class Main {
public static final int ONE_MINUTE_AS_MILLIS = 60 * 1000;
public static final String[] rpc_queries = {
"{\"method\":\"parity_versionInfo\",\"params\":[],\"id\":1,\"jsonrpc\":\"2.0\"}",
"{\"method\":\"eth_getTransactionReceipt\",\"params\":[\"0x444172bef57ad978655171a8af2cfd89baa02a97fcb773067aef7794d6913fff\"],\"id\":1,\"jsonrpc\":\"2.0\"}",
"{\"method\":\"eth_estimateGas\",\"params\":[{\"from\":\"0x0066Dc48bb833d2B59f730F33952B3c29fE926F5\"}],\"id\":1,\"jsonrpc\":\"2.0\"}",
"{\"method\":\"eth_getBalance\",\"params\":[\"0x0066Dc48bb833d2B59f730F33952B3c29fE926F5\"],\"id\":1,\"jsonrpc\":\"2.0\"}"
};
public static final String[] ws_queries = {
"{\"method\":\"parity_subscribe\",\"params\":[\"eth_getBalance\",[\"0xcd2a3d9f938e13cd947ec05abc7fe734df8dd826\",\"latest\"]],\"id\":1,\"jsonrpc\":\"2.0\"}",
"{\"method\":\"parity_subscribe\",\"params\":[\"parity_netPeers\"],\"id\":1,\"jsonrpc\":\"2.0\"}",
"{\"method\":\"eth_subscribe\",\"params\":[\"newHeads\"],\"id\":1,\"jsonrpc\":\"2.0\"}"
};
public static void runParity(String[] config) {
Parity parity = new Parity(config);
Callback rpcCallback = new Callback(1);
Callback webSocketCallback = new Callback(2);
for (String query : rpc_queries) {
parity.rpcQuery(query, ONE_MINUTE_AS_MILLIS, rpcCallback);
}
while (rpcCallback.getNumCallbacks() != 4);
Vector<Long> sessions = new Vector<Long>();
for (String ws : ws_queries) {
long session = parity.subscribeWebSocket(ws, webSocketCallback);
sessions.add(session);
}
try {
Thread.sleep(ONE_MINUTE_AS_MILLIS);
} catch (Exception e) {
System.out.println(e);
}
for (long session : sessions) {
parity.unsubscribeWebSocket(session);
}
// Force GC to destroy parity
parity = null;
System.gc();
}
public static void main(String[] args) {
String[] full = {"--no-ipc" , "--jsonrpc-apis=all", "--chain", "kovan"};
String[] light = {"--no-ipc", "--light", "--jsonrpc-apis=all", "--chain", "kovan"};
runParity(full);
try {
Thread.sleep(ONE_MINUTE_AS_MILLIS);
} catch (Exception e) {
System.out.println(e);
}
runParity(light);
}
}
class Callback {
private AtomicInteger counter;
private final int callbackType;
public Callback(int type) {
counter = new AtomicInteger();
callbackType = type;
}
public void callback(Object response) {
response = (String) response;
if (callbackType == 1) {
System.out.println("rpc: " + response);
} else if (callbackType == 2) {
System.out.println("ws: " + response);
}
counter.getAndIncrement();
}
public int getNumCallbacks() {
return counter.intValue();
}
}