我在 kafka 应用程序中有一个 gRPC 客户端。这意味着客户端将不断打开和关闭通道。
public class UserAgentClient {
protected final Logger logger = LoggerFactory.getLogger(getClass());
private static final Config uaparserConfig = ConfigFactory.load().getConfig(ua);
private final ManagedChannel channel;
private final UserAgentServiceGrpc.UserAgentServiceBlockingStub userAgentBlockingStub;
public UserAgentParserClient() {
this(ManagedChannelBuilder.forAddress(uaConfig.getString("host"), uaConfig.getInt("port")).usePlaintext());
}
public UserAgentClient(ManagedChannelBuilder<?> usePlaintext) {
channel = usePlaintext.build();
userAgentBlockingStub = UserAgentServiceGrpc.newBlockingStub(channel);
}
public UserAgentParseResponse getUserAgent(String userAgent ) {
UserAgentRequest request = UserAgentRequest.newBuilder().setUserAgent(userAgent).build();
UserAgentParseResponse response = null;
try {
response = userAgentBlockingStub.parseUserAgent(request);
} catch(Exception e) {
logger.warn("An exception has occurred during gRPC call to the user agent.", e.getMessage());
}
shutdown();
return response;
}
public void shutdown() {
try {
channel.shutdown();
} catch (InterruptedException ie) {
logger.warn("Interrupted exception during gRPC channel close", ie);
}
}
}
我想知道我是否可以一直保持频道打开?还是每次拨打新电话都必须打开频道?我想知道,因为我正在测试性能,如果我只是保持通道打开,它似乎会大大改善。另一方面,有什么我想念的吗?