diff options
Diffstat (limited to 'jsonrpc/src/main/java/com/orbekk/same/SameState.java')
-rw-r--r-- | jsonrpc/src/main/java/com/orbekk/same/SameState.java | 233 |
1 files changed, 0 insertions, 233 deletions
diff --git a/jsonrpc/src/main/java/com/orbekk/same/SameState.java b/jsonrpc/src/main/java/com/orbekk/same/SameState.java deleted file mode 100644 index c9cd216..0000000 --- a/jsonrpc/src/main/java/com/orbekk/same/SameState.java +++ /dev/null @@ -1,233 +0,0 @@ -package com.orbekk.same; - -import java.util.List; -import java.util.LinkedList; -import java.util.Map; -import java.util.HashMap; -import org.slf4j.Logger; -import org.slf4j.LoggerFactory; - -/** - * The implementation of a 'Same' state. - * - * This class manages the current state of the Same protocol. - */ -public class SameState extends Thread implements UrlReceiver { - private Logger logger = LoggerFactory.getLogger(getClass()); - private ConnectionManager connections; - - // TODO: Change the name of State. - private com.orbekk.same.State state = - new com.orbekk.same.State(); - - /** - * The client id of this participant. - */ - private String clientId; - - /** - * Stopping condition for this thread. - */ - private boolean stopped = false; - - private String _setState = null; - private Map<String, String> _setParticipants = null; - - private Map<String, String> pendingParticipants = - new HashMap<String, String>(); - - public SameState(String networkName, String clientId, - ConnectionManager connections) { - state.setNetworkName(networkName); - this.clientId = clientId; - this.connections = connections; - state.setMasterId(clientId); - state.getParticipants().put(clientId, null); - } - - public String getMasterId() { - return state.getMasterId(); - } - - public synchronized Map<String, String> getParticipants() { - return state.getParticipants(); - } - - /** - * Reset this SameService to an initial state. - * - * TODO: Implement fully. - */ - private synchronized void resetState() { - state = new com.orbekk.same.State(); - pendingParticipants.clear(); - } - - public synchronized void joinNetwork(String networkName, String masterId) { - resetState(); - state.setNetworkName(networkName); - state.setMasterId(masterId); - logger.info("Joined network {}.", networkName); - } - - public String getClientId() { - return clientId; - } - - public String getNetworkName() { - return state.getNetworkName(); - } - - public String getCurrentState() { - return state.getData(); - } - - /** - * TODO: Move to a separate library. - */ - public void librarySetNewState(String newState) { - connections.getConnection( - state.getParticipants().get(state.getMasterId())) - .setState(newState); - } - - public String getUrl() { - return state.getParticipants().get(clientId); - } - - @Override - public void setUrl(String url) { - logger.info("My URL is {}", url); - state.getParticipants().put(clientId, url); - } - - public synchronized void addParticipant(String clientId, String url) { - logger.info("PendingParticipant.add: {} ({})", clientId, url); - pendingParticipants.put(clientId, url); - notifyAll(); - } - - public synchronized void setParticipants(Map<String, String> participants) { - logger.info("Pending operation: _setParticipants"); - _setParticipants = participants; - notifyAll(); - } - - public synchronized void setState(String newState) { - logger.info("Pending operation: _setState"); - _setState = newState; - notifyAll(); - } - - private synchronized void handleSetParticipants() { - if (_setParticipants != null) { - if (isMaster()) { - logger.error("{}: Master received setParticipants.", clientId); - } else { - logger.info("{}: New participants committed.", clientId); - state.getParticipants().clear(); - state.getParticipants().putAll(_setParticipants); - } - } - _setParticipants = null; - } - - public synchronized void handleSetState() { - if (_setState != null) { - if (isMaster()) { - broadcast(new ServiceOperation() { - @Override void run(SameService service) { - service.setState(_setState); - } - }); - } - state.setData(_setState); - _setState = null; - } - } - - private boolean isMaster() { - return state.getMasterId().equals(clientId); - } - - private synchronized void handleNewParticipants() { - if (!isMaster()) { - for (Map.Entry<String, String> e : pendingParticipants.entrySet()) { - SameService master = connections.getConnection( - state.getParticipants().get(state.getMasterId())); - logger.info("Redirecting participant request to {}", - state.getMasterId()); - String clientId = e.getKey(); - String url = e.getValue(); - master.participateNetwork(state.getNetworkName(), clientId, - url); - } - } else { - state.getParticipants().putAll(pendingParticipants); - for (Map.Entry<String, String> e : - pendingParticipants.entrySet()) { - String clientId = e.getKey(); - String url = e.getValue(); - logger.info("New participant: {} URL({})", clientId, url); - SameService remoteService = connections.getConnection(url); - remoteService.notifyParticipation(state.getNetworkName(), - state.getMasterId()); - broadcast(new ServiceOperation(){ - @Override void run(SameService service) { - service.setParticipants(state.getParticipants()); - } - }); - } - } - pendingParticipants.clear(); - } - - /** - * This method runs the pending commands to SameState. - * - * It should be called by the worker thread, but can be called directly - * for testing purposes to avoid threading in unit tests. - */ - synchronized void internalRun() { - handleNewParticipants(); - handleSetState(); - handleSetParticipants(); - } - - public synchronized void run() { - while (!stopped) { - internalRun(); - try { - wait(1000); - } catch (InterruptedException e) { - // Ignore interrupt in wait loop. - } - } - } - - public synchronized void stopSame() { - try { - stopped = true; - notifyAll(); - this.join(); - } catch (InterruptedException e) { - logger.warn("Got InterruptedException while waiting for SameState " + - "to finish. Ignoring."); - } - } - - public abstract static class ServiceOperation { - abstract void run(SameService service); - } - - public synchronized void broadcast(ServiceOperation operation) { - for (Map.Entry<String, String> e : - state.getParticipants().entrySet()) { - String clientId = e.getKey(); - String url = e.getValue(); - if (!clientId.equals(this.clientId)) { - operation.run(connections.getConnection(url)); - } - } - } -} |