/**
* Creates a channel from an array of protocols. Note that after a {@link
* org.jgroups.JChannel#close()}, the protocol list <em>should not</em> be reused, ie. new
* JChannel(protocols) would reuse the same protocol list, and this might lead to problems !
*
* @param protocols The list of protocols, from bottom to top, ie. the first protocol in the list
* is the transport, the last the top protocol
* @throws Exception
*/
public JChannel(Collection<Protocol> protocols) throws Exception {
prot_stack = new ProtocolStack();
setProtocolStack(prot_stack);
for (Protocol prot : protocols) {
prot_stack.addProtocol(prot);
prot.setProtocolStack(prot_stack);
}
prot_stack.init();
// Substitute vars with defined system props (if any)
List<Protocol> prots = prot_stack.getProtocols();
Map<String, String> map = new HashMap<>();
for (Protocol prot : prots) Configurator.resolveAndAssignFields(prot, map);
}
public static void main(String[] args) throws Exception {
String input_file = null;
XmlConfigurator conf;
boolean old_format = false;
for (int i = 0; i < args.length; i++) {
if (args[i].equals("-old")) {
old_format = true;
continue;
}
if (args[i].equals("-file")) {
input_file = args[++i];
continue;
}
help();
return;
}
if (input_file != null) {
InputStream input = null;
try {
input = new FileInputStream(new File(input_file));
} catch (Throwable t) {
}
if (input == null) {
try {
input = new URL(input_file).openStream();
} catch (Throwable t) {
}
}
if (input == null)
input = Thread.currentThread().getContextClassLoader().getResourceAsStream(input_file);
if (old_format) {
String cfg = inputAsString(input);
List<ProtocolConfiguration> tmp = Configurator.parseConfigurations(cfg);
System.out.println(dump(tmp));
} else {
conf = XmlConfigurator.getInstance(input);
String tmp = conf.getProtocolStackString();
System.out.println("\n" + tmp);
}
} else {
log.error("no input file given");
}
}
public ProtocolTester(String prot_spec, Protocol harness) throws Exception {
if (prot_spec == null || harness == null)
throw new Exception("ProtocolTester(): prot_spec or harness is null");
props = prot_spec;
this.harness = harness;
props = "LOOPBACK:" + props; // add a loopback layer at the bottom of the stack
config = new Configurator();
JChannel mock_channel = new JChannel() {};
ProtocolStack stack = new ProtocolStack(mock_channel);
stack.setup(Configurator.parseConfigurations(props));
stack.insertProtocol(harness, ProtocolStack.ABOVE, stack.getTopProtocol().getClass());
bottom = stack.getBottomProtocol();
// has to be set after StartProtocolStack, otherwise the up and down handler threads in the
// harness
// will be started as well (we don't want that) !
// top.setUpProtocol(harness);
}
/**
* Creates a fork-stack from the configuration, initializes all protocols (setting values), sets
* the protocol stack as top protocol, connects the protocols and calls init() on them. Returns
* the protocols in a list, from bottom to top
*/
protected static List<Protocol> createProtocols(
ProtocolStack stack, List<ProtocolConfiguration> protocol_configs) throws Exception {
return Configurator.createProtocols(protocol_configs, stack);
}
@Override
public Channel createChannel(final String id) throws Exception {
JGroupsLogger.ROOT_LOGGER.debugf(
"Creating channel %s from stack %s", id, this.configuration.getName());
PrivilegedExceptionAction<JChannel> action =
new PrivilegedExceptionAction<JChannel>() {
@Override
public JChannel run() throws Exception {
return new JChannel(JChannelFactory.this);
}
};
final JChannel channel = WildFlySecurityManager.doChecked(action);
ProtocolStack stack = channel.getProtocolStack();
TransportConfiguration transportConfig = this.configuration.getTransport();
SocketBinding binding = transportConfig.getSocketBinding();
if (binding != null) {
channel.setSocketFactory(new ManagedSocketFactory(binding.getSocketBindings()));
}
// Relay protocol is added to stack programmatically, not via ProtocolStackConfigurator
RelayConfiguration relayConfig = this.configuration.getRelay();
if (relayConfig != null) {
String localSite = relayConfig.getSiteName();
List<RemoteSiteConfiguration> remoteSites = this.configuration.getRelay().getRemoteSites();
List<String> sites = new ArrayList<>(remoteSites.size() + 1);
sites.add(localSite);
// Collect bridges, eliminating duplicates
Map<String, RelayConfig.BridgeConfig> bridges = new HashMap<>();
for (final RemoteSiteConfiguration remoteSite : remoteSites) {
String siteName = remoteSite.getName();
sites.add(siteName);
String clusterName = remoteSite.getClusterName();
RelayConfig.BridgeConfig bridge =
new RelayConfig.BridgeConfig(clusterName) {
@Override
public JChannel createChannel() throws Exception {
JChannel channel = (JChannel) remoteSite.getChannel();
// Don't use FORK in bridge stack
channel.getProtocolStack().removeProtocol(FORK.class);
return channel;
}
};
bridges.put(clusterName, bridge);
}
RELAY2 relay = new RELAY2().site(localSite);
for (String site : sites) {
RelayConfig.SiteConfig siteConfig = new RelayConfig.SiteConfig(site);
relay.addSite(site, siteConfig);
if (site.equals(localSite)) {
for (RelayConfig.BridgeConfig bridge : bridges.values()) {
siteConfig.addBridge(bridge);
}
}
}
Map<String, String> relayProperties = new HashMap<>(relayConfig.getProperties());
Configurator.resolveAndAssignFields(relay, relayProperties);
Configurator.resolveAndInvokePropertyMethods(relay, relayProperties);
stack.addProtocol(relay);
relay.init();
}
UnknownForkHandler unknownForkHandler =
new UnknownForkHandler() {
private final short id = ClassConfigurator.getProtocolId(RequestCorrelator.class);
@Override
public Object handleUnknownForkStack(Message message, String forkStackId) {
return this.handle(message);
}
@Override
public Object handleUnknownForkChannel(Message message, String forkChannelId) {
return this.handle(message);
}
private Object handle(Message message) {
Header header = (Header) message.getHeader(this.id);
// If this is a request expecting a response, don't leave the requester hanging - send
// an identifiable response on which it can filter
if ((header != null) && (header.type == Header.REQ) && header.rspExpected()) {
Message response =
message
.makeReply()
.setFlag(message.getFlags())
.clearFlag(Message.Flag.RSVP, Message.Flag.SCOPED);
response.putHeader(FORK.ID, message.getHeader(FORK.ID));
response.putHeader(this.id, new Header(Header.RSP, 0, header.corrId));
response.setBuffer(UNKNOWN_FORK_RESPONSE.array());
channel.down(new Event(Event.MSG, response));
}
return null;
}
};
// Add implicit FORK to the top of the stack
FORK fork = new FORK();
fork.setUnknownForkHandler(unknownForkHandler);
stack.addProtocol(fork);
fork.init();
channel.setName(this.configuration.getNodeName());
TransportConfiguration.Topology topology = this.configuration.getTransport().getTopology();
if (topology != null) {
channel.addAddressGenerator(new TopologyAddressGenerator(topology));
}
return channel;
}