Examples of io.undertow.io.Sender

io.undertow.io.Sender
Sender interface that allows for callback based async IO. Note that all methods on this class are asynchronous, and may result in dispatch to an IO thread. After calling a method on this class you should not perform any more work on the current exchange until the callback is invoked. NOTE: implementers of this interface should be careful that they do not recursively call onComplete, which can lead to stack overflows if send is called many times. @author Stuart Douglas

            return;
        }
        final DirectBufferCache.CacheEntry existing = dataCache.get(cacheKey);
        //it is not cached yet, install a wrapper to grab the data
        if (existing == null || !existing.enabled() || !existing.reference()) {
            Sender newSender = sender;


            final DirectBufferCache.CacheEntry entry;
            if (existing == null) {
                entry = dataCache.add(cacheKey, length.intValue());
            } else {

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            return;
        }
        final DirectBufferCache.CacheEntry existing = dataCache.get(cacheKey);
        //it is not cached yet, install a wrapper to grab the data
        if (existing == null || !existing.enabled() || !existing.reference()) {
            Sender newSender = sender;


            final DirectBufferCache.CacheEntry entry;
            if (existing == null) {
                entry = dataCache.add(cacheKey, length.intValue());
            } else {

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                Set<Integer> codes = responseCodes;
                if (codes == null ? exchange.getResponseCode() >= 400 : codes.contains(Integer.valueOf(exchange.getResponseCode()))) {
                    final String errorPage = "<html><head><title>Error</title></head><body>" + exchange.getResponseCode() + " - " + StatusCodes.getReason(exchange.getResponseCode()) + "</body></html>";
                    exchange.getResponseHeaders().put(Headers.CONTENT_LENGTH, "" + errorPage.length());
                    exchange.getResponseHeaders().put(Headers.CONTENT_TYPE, "text/html");
                    Sender sender = exchange.getResponseSender();
                    sender.send(errorPage);
                    return true;
                }
                return false;
            }
        });

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            underlyingResource.serve(sender, exchange, completionCallback);
            return;
        }
        //it is not cached yet, install a wrapper to grab the data
        if (existing == null || !existing.enabled() || !existing.reference()) {
            Sender newSender = sender;


            final DirectBufferCache.CacheEntry entry;
            if (existing == null) {
                entry = dataCache.add(cacheKey, length.intValue(), cachingResourceManager.getMaxAge());
            } else {

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                processPing(exchange);
            }
        } catch (Exception e) {
            e.printStackTrace(System.out);
            exchange.setResponseCode(500);
            Sender resp = exchange.getResponseSender();


            ByteBuffer bb = ByteBuffer.allocate(100);
            bb.put(e.toString().getBytes());
            bb.flip();


            resp.send(bb);
            return;
        }
    }

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            }
        }


        exchange.setResponseCode(200);
        exchange.getResponseHeaders().add(new HttpString("Content-Type"), "text/html; charset=ISO-8859-1");
        Sender resp = exchange.getResponseSender();
        StringBuilder buf = new StringBuilder();
        buf.append("<html><head>\n<title>Mod_cluster Status</title>\n</head><body>\n");
        buf.append("<h1>" + MOD_CLUSTER_EXPOSED_VERSION + "</h1>");


        String uri = exchange.getRequestPath();
        String nonce = getNonce();
        if (refreshTime <= 0)
            buf.append("<a href=\"" + uri + "?" + nonce +
                    "&refresh=10" +
                    "\">Auto Refresh</a>");


        buf.append(" <a href=\"" + uri + "?" + nonce +
                "&Cmd=DUMP&Range=ALL" +
                "\">show DUMP output</a>");


        buf.append(" <a href=\"" + uri + "?" + nonce +
                "&Cmd=INFO&Range=ALL" +
                "\">show INFO output</a>");


        buf.append("\n");


        /* TODO sort the node by LBGroup (domain) */
        String lbgroup = "";
        for (Node node : container.getNodes()) {
            NodeConfig nodeConfig = node.getNodeConfig();
            if (!lbgroup.equals(nodeConfig.getDomain())) {
                lbgroup = nodeConfig.getDomain();
                if (reduceDisplay)
                    buf.append("<br/><br/>LBGroup " + lbgroup + ": ");
                else
                    buf.append("<h1> LBGroup " + lbgroup + ": ");
                if (allowCmd) {
                    domainCommandString(buf, uri, Status.ENABLED, lbgroup);
                    domainCommandString(buf, uri, Status.DISABLED, lbgroup);
                }
            }
            if (reduceDisplay) {
                buf.append("<br/><br/>Node " + nodeConfig.getJvmRoute());
                printProxyStat(buf, node, reduceDisplay);
            } else
                buf.append("<h1> Node " + nodeConfig.getJvmRoute() + " (" + nodeConfig.getType() + "://" + nodeConfig.getHostname() + ":" + nodeConfig.getPort() + "): </h1>\n");




            if (allowCmd) {
                nodeCommandString(buf, uri, Status.ENABLED, nodeConfig.getJvmRoute());
                nodeCommandString(buf, uri, Status.DISABLED, nodeConfig.getJvmRoute());
            }
            if (!reduceDisplay) {
                buf.append("<br/>\n");
                buf.append("Balancer: " + nodeConfig.getBalancer() + ",LBGroup: " + nodeConfig.getDomain());
                String flushpackets = "off";
                if (nodeConfig.isFlushPackets())
                    flushpackets = "Auto";
                buf.append(",Flushpackets: " + flushpackets + ",Flushwait: " + nodeConfig.getFlushwait() + ",Ping: " + nodeConfig.getPing() + " ,Smax: " + nodeConfig.getPing() + ",Ttl: " + nodeConfig.getTtl());
                printProxyStat(buf, node, reduceDisplay);
            } else {
                buf.append("<br/>\n");
            }
            // the sessionid list is mostly for demos.
            if (displaySessionids)
                buf.append(",Num sessions: " + container.getJVMRouteSessionCount(nodeConfig.getJvmRoute()));
            buf.append("\n");


            // Process the virtual-host of the node
            printInfoHost(buf, uri, reduceDisplay, allowCmd, nodeConfig.getJvmRoute());
        }


        // Display the all the actives sessions
        if (displaySessionids) {
            printInfoSessions(buf, container.getSessionIds());
        }


        buf.append("</body></html>\n");
        resp.send(buf.toString());
    }

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        }
        if (jvmRoute == null) {
            if (scheme == null && host == null && port == null) {
                exchange.getResponseHeaders().add(new HttpString("Content-Type"), "text/plain");
                String data = "Type=PING-RSP&State=OK";
                Sender resp = exchange.getResponseSender();
                ByteBuffer bb = ByteBuffer.allocate(data.length());
                bb.put(data.getBytes());
                bb.flip();
                resp.send(bb);
                return;
            } else {
                if (scheme == null || host == null || port == null) {
                    processError(TYPESYNTAX, SMISFLD, exchange);
                    return;
                }
                exchange.getResponseHeaders().add(new HttpString("Content-Type"), "text/plain");
                String data = "Type=PING-RSP";
                if (ishostUp(scheme, host, port))
                    data = data.concat("&State=OK");
                else
                    data = data.concat("&State=NOTOK");


                Sender resp = exchange.getResponseSender();
                ByteBuffer bb = ByteBuffer.allocate(data.length());
                bb.put(data.getBytes());
                bb.flip();
                resp.send(bb);
                return;
            }
        } else {
            // ping the corresponding node.
            Node nodeConfig = container.getNode(jvmRoute);
            if (nodeConfig == null) {
                processError(TYPEMEM, MNODERD, exchange);
                return;
            }
            exchange.getResponseHeaders().add(new HttpString("Content-Type"), "text/plain");
            String data = "Type=PING-RSP";
            if (isNodeUp(nodeConfig))
                data = data.concat("&State=OK");
            else
                data = data.concat("&State=NOTOK");


            Sender resp = exchange.getResponseSender();
            ByteBuffer bb = ByteBuffer.allocate(data.length());
            bb.put(data.getBytes());
            bb.flip();
            resp.send(bb);
        }
    }

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        String data = processInfoString();
        exchange.setResponseCode(200);
        exchange.getResponseHeaders().add(new HttpString("Content-Type"), "text/plain");
        exchange.getResponseHeaders().add(new HttpString("Server"), "Mod_CLuster/0.0.0");


        Sender resp = exchange.getResponseSender();
        ByteBuffer bb = ByteBuffer.allocate(data.length());
        bb.put(data.getBytes());
        bb.flip();


        resp.send(bb);
        return;
    }

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        String data = processDumpString();
        exchange.setResponseCode(200);
        exchange.getResponseHeaders().add(new HttpString("Content-Type"), "text/plain");
        exchange.getResponseHeaders().add(new HttpString("Server"), "Mod_CLuster/0.0.0");


        Sender resp = exchange.getResponseSender();
        ByteBuffer bb = ByteBuffer.allocate(data.length());
        bb.put(data.getBytes());
        bb.flip();


        resp.send(bb);
    }

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                Set<Integer> codes = responseCodes;
                if (codes == null ? exchange.getResponseCode() >= 400 : codes.contains(Integer.valueOf(exchange.getResponseCode()))) {
                    final String errorPage = "<html><head><title>Error</title></head><body>" + exchange.getResponseCode() + " - " + StatusCodes.getReason(exchange.getResponseCode()) + "</body></html>";
                    exchange.getResponseHeaders().put(Headers.CONTENT_LENGTH, "" + errorPage.length());
                    exchange.getResponseHeaders().put(Headers.CONTENT_TYPE, "text/html");
                    Sender sender = exchange.getResponseSender();
                    sender.send(errorPage);
                    return true;
                }
                return false;
            }
        });

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