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Update Java example

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Joseph Henry 5 years ago
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5 changed files with 175 additions and 181 deletions
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  1. 161
      examples/java/Example.java
  2. 9
      examples/java/Makefile
  3. 26
      examples/java/README.md
  4. 64
      examples/java/src/com/zerotier/libzt/javasimpleexample/Main.java
  5. 96
      examples/java/src/com/zerotier/libzt/javasimpleexample/MyZeroTierEventListener.java

161
examples/java/Example.java
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//package com.zerotier.libzt.javasimpleexample;
import com.zerotier.libzt.ZeroTier;
import com.zerotier.libzt.ZeroTierEventListener;
import java.math.BigInteger;
public class Example {
static void sleep(int ms) {
try {
Thread.sleep(ms);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
String keyPath="."; // Default to current directory
BigInteger networkId;
Integer servicePort=0;
if (args.length != 3) {
System.err.println(" Invalid arguments");
System.err.println(" Usage: example <path_to_write_keys> <nwid> <ztServicePort>");
System.exit(1);
}
keyPath = args[0];
networkId = new BigInteger(args[1], 16);
servicePort = Integer.parseInt(args[2]);
System.out.println("networkId = " + Long.toHexString(networkId.longValue()));
System.out.println("keyPath = " + keyPath);
System.out.println("servicePort = " + servicePort);
//
// BEGIN SETUP
//
// Set up event listener and start service
MyZeroTierEventListener listener = new MyZeroTierEventListener();
ZeroTier.start(keyPath, (ZeroTierEventListener)listener, servicePort);
// Wait for EVENT_NODE_ONLINE
System.out.println("waiting for node to come online...");
while (listener.isOnline == false) { sleep(50); }
System.out.println("joining network");
ZeroTier.join(networkId.longValue());
// Wait for EVENT_NETWORK_READY_IP4/6
System.out.println("waiting for network config...");
while (listener.isNetworkReady == false) { sleep(50); }
System.out.println("joined");
//
// END SETUP
//
sleep(120000);
/**
*
* Begin using socket API after this point:
*
* ZeroTier.ZeroTierSocket, ZeroTier.ZeroTierSocketFactory, etc
*
* (or)
*
* ZeroTier.socket(), ZeroTier.connect(), etc
*/
}
}
/**
* Example event handling
*/
class MyZeroTierEventListener implements ZeroTierEventListener {
public boolean isNetworkReady = false;
public boolean isOnline = false;
public void onZeroTierEvent(long id, int eventCode) {
if (eventCode == ZeroTier.EVENT_NODE_UP) {
System.out.println("EVENT_NODE_UP: nodeId=" + Long.toHexString(id));
}
if (eventCode == ZeroTier.EVENT_NODE_ONLINE) {
// The core service is running properly and can join networks now
System.out.println("EVENT_NODE_ONLINE: nodeId=" + Long.toHexString(id));
isOnline = true;
}
if (eventCode == ZeroTier.EVENT_NODE_OFFLINE) {
// Network does not seem to be reachable by any available strategy
System.out.println("EVENT_NODE_OFFLINE");
}
if (eventCode == ZeroTier.EVENT_NODE_DOWN) {
// Called when the node is shutting down
System.out.println("EVENT_NODE_DOWN");
}
if (eventCode == ZeroTier.EVENT_NODE_IDENTITY_COLLISION) {
// Another node with this identity already exists
System.out.println("EVENT_NODE_IDENTITY_COLLISION");
}
if (eventCode == ZeroTier.EVENT_NODE_UNRECOVERABLE_ERROR) {
// Try again
System.out.println("EVENT_NODE_UNRECOVERABLE_ERROR");
}
if (eventCode == ZeroTier.EVENT_NODE_NORMAL_TERMINATION) {
// Normal closure
System.out.println("EVENT_NODE_NORMAL_TERMINATION");
}
if (eventCode == ZeroTier.EVENT_NETWORK_READY_IP4) {
// We have at least one assigned address and we've received a network configuration
System.out.println("ZTS_EVENT_NETWORK_READY_IP4: nwid=" + Long.toHexString(id));
isNetworkReady = true;
}
if (eventCode == ZeroTier.EVENT_NETWORK_READY_IP6) {
// We have at least one assigned address and we've received a network configuration
System.out.println("ZTS_EVENT_NETWORK_READY_IP6: nwid=" + Long.toHexString(id));
//isNetworkReady = true;
}
if (eventCode == ZeroTier.EVENT_NETWORK_DOWN) {
// Someone called leave(), we have no assigned addresses, or otherwise cannot use this interface
System.out.println("EVENT_NETWORK_DOWN: nwid=" + Long.toHexString(id));
}
if (eventCode == ZeroTier.EVENT_NETWORK_REQ_CONFIG) {
// Waiting for network configuration
System.out.println("EVENT_NETWORK_REQ_CONFIG: nwid=" + Long.toHexString(id));
}
if (eventCode == ZeroTier.EVENT_NETWORK_OK) {
// Config received and this node is authorized for this network
System.out.println("EVENT_NETWORK_OK: nwid=" + Long.toHexString(id));
}
if (eventCode == ZeroTier.EVENT_NETWORK_ACCESS_DENIED) {
// You are not authorized to join this network
System.out.println("EVENT_NETWORK_ACCESS_DENIED: nwid=" + Long.toHexString(id));
}
if (eventCode == ZeroTier.EVENT_NETWORK_NOT_FOUND) {
// The virtual network does not exist
System.out.println("EVENT_NETWORK_NOT_FOUND: nwid=" + Long.toHexString(id));
}
if (eventCode == ZeroTier.EVENT_NETWORK_CLIENT_TOO_OLD) {
// The core version is too old
System.out.println("EVENT_NETWORK_CLIENT_TOO_OLD: nwid=" + Long.toHexString(id));
}
if (eventCode == ZeroTier.EVENT_PEER_DIRECT) {
System.out.println("EVENT_PEER_DIRECT: id=" + Long.toHexString(id));
/*
ZeroTierPeerDetails details = new ZeroTierPeerDetails();
ZeroTier.get_peer(id, details);
System.out.println("address="+Long.toHexString(details.address));
System.out.println("pathCount="+details.pathCount);
System.out.println("version="+details.versionMajor+"."+details.versionMinor+"."+details.versionRev);
System.out.println("latency="+details.latency); // Not relevant
System.out.println("role="+details.role); // Not relevent
// Print all known paths
for (int i=0; i<details.pathCount; i++) {
System.out.println("addr="+details.paths[i].toString());
}
*/
}
if (eventCode == ZeroTier.EVENT_PEER_RELAY) {
System.out.println("EVENT_PEER_RELAY: id=" + Long.toHexString(id));
}
}
}

9
examples/java/Makefile
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all:
jar xf *.jar libzt.dylib
javac -cp *.jar Example.java
clean:
rm -rf *.class
superclean: clean
rm -rf *.dylib *.so *.jar

26
examples/java/README.md
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### How to compile/use this example:
# Java example
1. Follow "Building from source" section from README.md in the root of this git repository
(the linking step/example from that section does not apply to this example)
1). Build or download the `zt-1.3.3.jar`, copy it to this directory
2. Create the java library .jar file:
2). Run `make`
```
make host_jar_release
```
3). `java -cp ".:zt-1.3.3.jar" Example id_path 0123456789abcdef 9997`
for other `host_jar` variants see Makefile in the root of this git repository
2. Copy the output .jar to this directory:
```
cp lib/lib/release/linux-x86_64/zt.jar examples/java/simpleExample/
```
3. Now you can compile this example:
```
cd src
javac -cp ../zt.jar ./com/zerotier/libzt/javasimpleexample/*.java
```
See [src/bindings/java](../../src/bindings/java) for wrapper implementation code.

64
examples/java/src/com/zerotier/libzt/javasimpleexample/Main.java
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/*
* ZeroTier SDK - Network Virtualization Everywhere
* Copyright (C) 2011-2018 ZeroTier, Inc. https://www.zerotier.com/
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*
* --
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial closed-source software that incorporates or links
* directly against ZeroTier software without disclosing the source code
* of your own application.
*/
package com.zerotier.libzt.javasimpleexample;
import com.zerotier.libzt.ZeroTier;
public class Main {
static void sleep(int ms) {
try {
Thread.sleep(ms);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
// Set up event listener and start service
MyZeroTierEventListener listener = new MyZeroTierEventListener();
int servicePort = 9994;
ZeroTier.start("test/path", listener, servicePort);
// Wait for EVENT_NODE_ONLINE
System.out.println("waiting for node to come online...");
while (listener.isOnline == false) { sleep(50); }
System.out.println("joining network");
ZeroTier.join(0x0123456789abcdefL);
// Wait for EVENT_NETWORK_READY_IP4/6
System.out.println("waiting for network config...");
while (listener.isNetworkReady == false) { sleep(50); }
System.out.println("joined");
/*
Begin using socket API after this point
Use ZeroTier.ZeroTierSocket, ZeroTier.ZeroTierSocketFactory, etc
(or)
ZeroTier.socket(), ZeroTier.connect(), etc
*/
}
}

96
examples/java/src/com/zerotier/libzt/javasimpleexample/MyZeroTierEventListener.java
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package com.zerotier.libzt.javasimpleexample;
import com.zerotier.libzt.ZeroTier;
import com.zerotier.libzt.ZeroTierEventListener;
public class MyZeroTierEventListener implements ZeroTierEventListener {
public boolean isNetworkReady = false;
public boolean isOnline = false;
public void onZeroTierEvent(long id, int eventCode) {
if (eventCode == ZeroTier.EVENT_NODE_UP) {
System.out.println("EVENT_NODE_UP: nodeId=" + Long.toHexString(id));
}
if (eventCode == ZeroTier.EVENT_NODE_ONLINE) {
// The core service is running properly and can join networks now
System.out.println("EVENT_NODE_ONLINE: nodeId=" + Long.toHexString(ZeroTier.get_node_id()));
isOnline = true;
}
if (eventCode == ZeroTier.EVENT_NODE_OFFLINE) {
// Network does not seem to be reachable by any available strategy
System.out.println("EVENT_NODE_OFFLINE");
}
if (eventCode == ZeroTier.EVENT_NODE_DOWN) {
// Called when the node is shutting down
System.out.println("EVENT_NODE_DOWN");
}
if (eventCode == ZeroTier.EVENT_NODE_IDENTITY_COLLISION) {
// Another node with this identity already exists
System.out.println("EVENT_NODE_IDENTITY_COLLISION");
}
if (eventCode == ZeroTier.EVENT_NODE_UNRECOVERABLE_ERROR) {
// Try again
System.out.println("EVENT_NODE_UNRECOVERABLE_ERROR");
}
if (eventCode == ZeroTier.EVENT_NODE_NORMAL_TERMINATION) {
// Normal closure
System.out.println("EVENT_NODE_NORMAL_TERMINATION");
}
if (eventCode == ZeroTier.EVENT_NETWORK_READY_IP4) {
// We have at least one assigned address and we've received a network configuration
System.out.println("ZTS_EVENT_NETWORK_READY_IP4: nwid=" + Long.toHexString(id));
if (id == 0xa09acf0233e4b070L) {
isNetworkReady = true;
}
}
if (eventCode == ZeroTier.EVENT_NETWORK_READY_IP6) {
// We have at least one assigned address and we've received a network configuration
System.out.println("ZTS_EVENT_NETWORK_READY_IP6: nwid=" + Long.toHexString(id));
//isNetworkReady = true;
}
if (eventCode == ZeroTier.EVENT_NETWORK_DOWN) {
// Someone called leave(), we have no assigned addresses, or otherwise cannot use this interface
System.out.println("EVENT_NETWORK_DOWN: nwid=" + Long.toHexString(id));
}
if (eventCode == ZeroTier.EVENT_NETWORK_REQUESTING_CONFIG) {
// Waiting for network configuration
System.out.println("EVENT_NETWORK_REQUESTING_CONFIG: nwid=" + Long.toHexString(id));
}
if (eventCode == ZeroTier.EVENT_NETWORK_OK) {
// Config received and this node is authorized for this network
System.out.println("EVENT_NETWORK_OK: nwid=" + Long.toHexString(id));
}
if (eventCode == ZeroTier.EVENT_NETWORK_ACCESS_DENIED) {
// You are not authorized to join this network
System.out.println("EVENT_NETWORK_ACCESS_DENIED: nwid=" + Long.toHexString(id));
}
if (eventCode == ZeroTier.EVENT_NETWORK_NOT_FOUND) {
// The virtual network does not exist
System.out.println("EVENT_NETWORK_NOT_FOUND: nwid=" + Long.toHexString(id));
}
if (eventCode == ZeroTier.EVENT_NETWORK_CLIENT_TOO_OLD) {
// The core version is too old
System.out.println("EVENT_NETWORK_CLIENT_TOO_OLD: nwid=" + Long.toHexString(id));
}
if (eventCode == ZeroTier.EVENT_PEER_P2P) {
System.out.println("EVENT_PEER_P2P: id=" + Long.toHexString(id));
/*
ZeroTierPeerDetails details = new ZeroTierPeerDetails();
ZeroTier.get_peer(id, details);
System.out.println("address="+Long.toHexString(details.address));
System.out.println("pathCount="+details.pathCount);
System.out.println("version="+details.versionMajor+"."+details.versionMinor+"."+details.versionRev);
System.out.println("latency="+details.latency); // Not relevant
System.out.println("role="+details.role); // Not relevent
// Print all known paths
for (int i=0; i<details.pathCount; i++) {
System.out.println("addr="+details.paths[i].toString());
}
*/
}
if (eventCode == ZeroTier.EVENT_PEER_RELAY) {
System.out.println("EVENT_PEER_RELAY: id=" + Long.toHexString(id));
}
}
}
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