Example usage for org.springframework.web.socket.messaging SubProtocolHandler getSupportedProtocols

Introduction

In this page you can find the example usage for org.springframework.web.socket.messaging SubProtocolHandler getSupportedProtocols.

Prototype

List<String> getSupportedProtocols();

Source Link

Document

Return the list of sub-protocols supported by this handler (never null ).

Usage

From source file:org.springframework.integration.websocket.support.SubProtocolHandlerRegistry.java

public SubProtocolHandlerRegistry(List<SubProtocolHandler> protocolHandlers,
        SubProtocolHandler defaultProtocolHandler) {
    Assert.state(!CollectionUtils.isEmpty(protocolHandlers) || defaultProtocolHandler != null,
            "One of 'protocolHandlers' or 'defaultProtocolHandler' must be provided");

    if (!CollectionUtils.isEmpty(protocolHandlers)) {
        for (SubProtocolHandler handler : protocolHandlers) {
            List<String> protocols = handler.getSupportedProtocols();
            if (CollectionUtils.isEmpty(protocols)) {
                logger.warn("No sub-protocols, ignoring handler " + handler);
                continue;
            }/*w ww .  j av  a2 s  .com*/
            for (String protocol : protocols) {
                SubProtocolHandler replaced = this.protocolHandlers.put(protocol, handler);
                if (replaced != null) {
                    throw new IllegalStateException("Failed to map handler " + handler + " to protocol '"
                            + protocol + "', it is already mapped to handler " + replaced);
                }
            }
        }
    }

    if (this.protocolHandlers.size() == 1 && defaultProtocolHandler == null) {
        this.defaultProtocolHandler = this.protocolHandlers.values().iterator().next();
    } else {
        this.defaultProtocolHandler = defaultProtocolHandler;
        if (this.protocolHandlers.isEmpty() && this.defaultProtocolHandler != null) {
            List<String> protocols = this.defaultProtocolHandler.getSupportedProtocols();
            for (String protocol : protocols) {
                SubProtocolHandler replaced = this.protocolHandlers.put(protocol, this.defaultProtocolHandler);
                if (replaced != null) {
                    throw new IllegalStateException("Failed to map handler " + this.defaultProtocolHandler
                            + " to protocol '" + protocol + "', it is already mapped to handler " + replaced);
                }
            }
        }
    }
}

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From source file:org.springframework.web.socket.messaging.SubProtocolWebSocketHandler.java

/**
 * Register a sub-protocol handler.//from   w ww.  jav  a2 s.com
 */
public void addProtocolHandler(SubProtocolHandler handler) {
    List<String> protocols = handler.getSupportedProtocols();
    if (CollectionUtils.isEmpty(protocols)) {
        if (logger.isErrorEnabled()) {
            logger.error("No sub-protocols for " + handler);
        }
        return;
    }
    for (String protocol : protocols) {
        SubProtocolHandler replaced = this.protocolHandlerLookup.put(protocol, handler);
        if (replaced != null && replaced != handler) {
            throw new IllegalStateException("Cannot map " + handler + " to protocol '" + protocol
                    + "': already mapped to " + replaced + ".");
        }
    }
    this.protocolHandlers.add(handler);
}

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