Examples with LoadBalancer org.apache.servicecomb.loadbalance.LoadBalancer used on opensource projects

Example 1 with LoadBalancer

use of org.apache.servicecomb.loadbalance.LoadBalancer in project java-chassis by ServiceComb.

the class CommonHttpEdgeDispatcher method onRequest.

protected void onRequest(RoutingContext context) {
    URLMappedConfigurationItem configurationItem = findConfigurationItem(context.request().uri());
    if (configurationItem == null) {
        context.next();
        return;
    }
    String uri = Utils.findActualPath(context.request().uri(), configurationItem.getPrefixSegmentCount());
    Invocation invocation = new Invocation() {

        @Override
        public String getConfigTransportName() {
            return "rest";
        }

        @Override
        public String getMicroserviceName() {
            return configurationItem.getMicroserviceName();
        }
    };
    LoadBalancer loadBalancer = getOrCreateLoadBalancer(invocation, configurationItem.getMicroserviceName(), configurationItem.getVersionRule());
    ServiceCombServer server = loadBalancer.chooseServer(invocation);
    if (server == null) {
        LOG.warn("no available server for service {}", configurationItem.getMicroserviceName());
        serverNotReadyResponse(context);
        return;
    }
    URIEndpointObject endpointObject = new URIEndpointObject(server.getEndpoint().getEndpoint());
    RequestOptions requestOptions = new RequestOptions();
    requestOptions.setHost(endpointObject.getHostOrIp()).setPort(endpointObject.getPort()).setSsl(endpointObject.isSslEnabled()).setMethod(context.request().method()).setURI(uri);
    HttpClient httpClient;
    if (endpointObject.isHttp2Enabled()) {
        httpClient = HttpClients.getClient(Http2TransportHttpClientOptionsSPI.CLIENT_NAME, false).getHttpClient();
    } else {
        httpClient = HttpClients.getClient(HttpTransportHttpClientOptionsSPI.CLIENT_NAME, false).getHttpClient();
    }
    context.request().pause();
    httpClient.request(requestOptions).compose(httpClientRequest -> {
        context.request().headers().forEach((header) -> httpClientRequest.headers().set(header.getKey(), header.getValue()));
        context.request().resume();
        context.request().handler(httpClientRequest::write);
        context.request().endHandler((v) -> httpClientRequest.end());
        return httpClientRequest.response().compose(httpClientResponse -> {
            context.response().setStatusCode(httpClientResponse.statusCode());
            httpClientResponse.headers().forEach((header) -> context.response().headers().set(header.getKey(), header.getValue()));
            httpClientResponse.handler(this.responseHandler(context));
            httpClientResponse.endHandler((v) -> context.response().end());
            return Future.succeededFuture();
        });
    }).onFailure(failure -> {
        LOG.warn("send request to target {}:{} failed, cause {}", endpointObject.getHostOrIp(), endpointObject.getPort(), failure.getMessage());
        serverNotReadyResponse(context);
    });
}