Examples with RestyException com.github.df.restypass.exception.execute.RestyException used on opensource projects

Example 1 with RestyException

use of com.github.df.restypass.exception.execute.RestyException in project RestyPass by darren-fu.

the class RestyFuture method get.

@Override
public T get() throws RestyException {
    Response response;
    try {
        response = future.get();
    } catch (InterruptedException | ExecutionException e) {
        future.abort(e);
        log.warn("获取响应失败:{}", e.getMessage());
        if (this.getRestyCommand().isAsyncArg() || this.getRestyCommand().isAsyncReturn()) {
            throw new RestyException(e);
        }
        response = FailedResponse.create(new ConnectionException(e));
    }
    T resp = (T) ResponseConverterContext.DEFAULT.convertResponse(restyCommand, response);
    if (restyCommand.isAsyncReturn() || restyCommand.isAsyncArg()) {
        if (RestyCommandStatus.FAILED == restyCommand.getStatus() && restyCommand.getFailException() != null) {
            throw restyCommand.getFailException();
        }
    }
    return resp;
}

Example 2 with RestyException

use of com.github.df.restypass.exception.execute.RestyException in project RestyPass by darren-fu.

the class RestyProxyInvokeHandler method invoke.

@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
    if (isSpecialMethod(method)) {
        return handleSpecialMethod(proxy, method, args);
    }
    Object result;
    // 创建请求载体，RestyCommand
    RestyCommand restyCommand = new DefaultRestyCommand(method.getDeclaringClass(), method, method.getGenericReturnType(), args, restyCommandContext);
    // 获取过滤器
    List<CommandFilter> filterList = commandFilterContext.getFilterList();
    // 执行过滤器
    for (CommandFilter commandFilter : filterList) {
        if (CommandFilterType.BEFOR_EXECUTE.equals(commandFilter.getFilterType()) && commandFilter.shouldFilter(restyCommand)) {
            commandFilter.before(restyCommand);
        }
    }
    // 创建负载均衡器
    LoadBalancer loadBalancer = LoadBalanceFactory.createLoadBalancerForService(restyCommand.getServiceName(), restyCommand.getRestyCommandConfig().getLoadBalancer());
    // 为executor设置服务容器
    commandExecutor.setServerContext(serverContext);
    try {
        if (commandExecutor.executable(restyCommand)) {
            result = commandExecutor.execute(loadBalancer, restyCommand);
        } else {
            throw new IllegalStateException("Resty command is not executable:" + restyCommand);
        }
    } catch (RestyException ex) {
        if (fallbackExecutor.executable(restyCommand)) {
            if (log.isDebugEnabled()) {
                log.debug("{}使用降级服务", restyCommand.getPath());
            }
            try {
                result = fallbackExecutor.execute(restyCommand);
            } catch (FallbackException fe) {
                log.warn("服务{}降级发生异常:{}", restyCommand.getPath(), fe.getMessage());
                // 抛出原始Resty异常
                throw ex;
            }
        } else {
            log.warn("请求{}发生异常:{}", restyCommand.getPath(), ex.getMessage());
            throw ex;
        }
    }
    return result;
}

Example 3 with RestyException

use of com.github.df.restypass.exception.execute.RestyException in project RestyPass by darren-fu.

the class RestyCommandExecutor method execute.

@Override
public Object execute(LoadBalancer lb, RestyCommand restyCommand) throws RestyException {
    if (restyCommand.getRestyCommandConfig().isForceBreakEnabled()) {
        throw new CircuitBreakException("circuit breaker is forced to open");
    }
    // 重试次数
    int retry = restyCommand.getRestyCommandConfig().getRetry();
    Object result = null;
    CircuitBreaker circuitBreaker = CircuitBreakerFactory.createDefaultCircuitBreaker(restyCommand.getServiceName());
    // RestyCommand ready to start
    restyCommand.ready(circuitBreaker);
    // 排除 彻底断路的server， 尝试过的server
    // 1.判断command使用的serverInstanceList是否存在被熔断的server
    // 1.1 存在的话 server加入 loadBalance 的excludeServerList
    Set<String> excludeInstanceIdSet = circuitBreaker.getBrokenServer();
    // 负载均衡器 选择可用服务实例
    ServerInstance serverInstance = lb.choose(serverContext, restyCommand, excludeInstanceIdSet);
    if (serverInstance == null) {
        throw new RuntimeException("no instances found:" + restyCommand.getServiceName() + ":" + serverContext.getServerList(restyCommand.getServiceName()));
    }
    // 重试机制
    for (int times = 0; times <= retry; times++) {
        try {
            boolean shouldPass = circuitBreaker.shouldPass(restyCommand, serverInstance);
            if (!shouldPass) {
                // fallback or exception
                throw new CircuitBreakException("circuit breaker is open");
            }
            RestyFuture future = restyCommand.start(serverInstance);
            RestyFuture futureArg = getFutureArg(restyCommand);
            if (restyCommand.isAsyncArg()) {
                // 直接返回null， 结果放入出参RestyFuture中
                return null;
            }
            if (restyCommand.isAsyncReturn()) {
                // 返回RestyFuture
                return future;
            }
            // 同步调用
            result = future.get();
            if (restyCommand.getStatus() == RestyCommandStatus.FAILED) {
                throw restyCommand.getFailException();
            }
            if (restyCommand.getStatus() == RestyCommandStatus.SUCCESS) {
                // 响应成功，无需重试了
                break;
            }
        } catch (Exception ex) {
            if (times == retry) {
                throw ex;
            } else {
                // 将本次使用的server 加入排除列表
                if (excludeInstanceIdSet == null || excludeInstanceIdSet == Collections.EMPTY_SET) {
                    excludeInstanceIdSet = new HashSet<>();
                }
                if (serverInstance != null) {
                    excludeInstanceIdSet.add(serverInstance.getInstanceId());
                }
                // 选择server， 如果没有server可选则无需重试，直接抛出当前异常
                serverInstance = lb.choose(serverContext, restyCommand, excludeInstanceIdSet);
                if (serverInstance == null || excludeInstanceIdSet.contains(serverInstance.getInstanceId())) {
                    throw ex;
                } else if (log.isDebugEnabled()) {
                    log.debug("请求切换服务实例重试:{}", serverInstance);
                }
            }
        }
    }
    return result;
}

Example 4 with RestyException

use of com.github.df.restypass.exception.execute.RestyException in project RestyPass by darren-fu.

the class RestyFuture method get.

@SuppressWarnings("NullableProblems")
@Override
public T get(long timeout, TimeUnit unit) throws RestyException {
    Response response;
    try {
        response = future.get(timeout, unit);
    } catch (InterruptedException | ExecutionException | TimeoutException e) {
        future.abort(e);
        log.error("获取响应失败:{}", e.getMessage());
        if (this.getRestyCommand().isAsyncArg() || this.getRestyCommand().isAsyncReturn()) {
            throw new RestyException(e);
        }
        response = FailedResponse.create(new ConnectionException(e));
    }
    T resp = (T) ResponseConverterContext.DEFAULT.convertResponse(restyCommand, response);
    if (restyCommand.isAsyncReturn() || restyCommand.isAsyncArg()) {
        if (RestyCommandStatus.FAILED == restyCommand.getStatus() && restyCommand.getFailException() != null) {
            throw restyCommand.getFailException();
        }
    }
    return resp;
}

Example 5 with RestyException

use of com.github.df.restypass.exception.execute.RestyException in project RestyPass by darren-fu.

the class ResponseConverterContext method convertResponse.

/**
 * Convert response object.
 *
 * @param restyCommand the resty command
 * @param response     the response
 * @return the object
 */
public Object convertResponse(RestyCommand restyCommand, Response response) {
    Object result = null;
    // response 为null
    if (response == null) {
        log.warn("response is null,command:{}", restyCommand);
        restyCommand.failed(new ServerException("Failed to get response, it's null"));
        return result;
    }
    // response为FailedResponse， [connectException InterruptedException]  status 500
    if (FailedResponse.isFailedResponse(response)) {
        log.warn("response is failed by exception:{}", FailedResponse.class.cast(response).getException().getMessage(), FailedResponse.class.cast(response).getException());
        restyCommand.failed(FailedResponse.class.cast(response).getException());
        return result;
    }
    // 服务响应了请求，但是不是200
    int statusCode = response.getStatusCode();
    if (200 != statusCode) {
        if (statusCode >= 400 && statusCode < 500) {
            restyCommand.failed(new RequestException("Request: " + restyCommand + "; Response: " + response.toString()));
        } else if (statusCode >= 500) {
            restyCommand.failed(new ServerException("Request: " + restyCommand + "; Response: " + response.toString()));
        }
        log.warn("request is bad,status code:{},request:{},response:{}", statusCode, restyCommand, response);
        return result;
    }
    byte[] body = response.getResponseBodyAsBytes();
    // 使用转换器 转换响应结果   json->object
    boolean converted = false;
    Type returnType = restyCommand.getReturnType();
    String respContentType = response.getContentType();
    for (ResponseConverter converter : converterList) {
        if (converter.support(returnType, respContentType)) {
            converted = true;
            result = converter.convert(body, returnType, respContentType);
            break;
        }
    }
    if (!converted) {
        restyCommand.failed(new RestyException("没有合适的解析器,content-type:" + respContentType + ";body:" + response.getResponseBody()));
        log.warn("没有合适的解析器,content-type:{};body:{}", respContentType, response.getResponseBody());
    }
    restyCommand.success();
    return result;
}