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@ -16,7 +16,7 @@ import ( |
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const ( |
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statusUp = "UP" |
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statusDown = "DOWN" |
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statusOutOfServeice = "OUT_OF_SERVICE" |
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statusOutOfService = "OUT_OF_SERVICE" |
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heartbeatRetry = 3 |
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maxIdleConns = 100 |
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heartbeatTime = 10 |
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@ -153,7 +153,7 @@ func NewClient(urls []string, opts ...ClientOption) *Client { |
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func (e *Client) FetchApps(ctx context.Context) []Application { |
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var m ApplicationsRootResponse |
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if err := e.do(ctx, "GET", []string{"apps"}, nil, &m); err != nil { |
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if err := e.do(ctx, http.MethodGet, []string{"apps"}, nil, &m); err != nil { |
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return nil |
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} |
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@ -161,7 +161,7 @@ func (e *Client) FetchApps(ctx context.Context) []Application { |
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} |
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func (e *Client) FetchAppInstances(ctx context.Context, appID string) (m Application, err error) { |
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err = e.do(ctx, "GET", []string{"apps", appID}, nil, &m) |
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err = e.do(ctx, http.MethodGet, []string{"apps", appID}, nil, &m) |
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return |
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} |
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@ -174,21 +174,21 @@ func (e *Client) FetchAppUpInstances(ctx context.Context, appID string) []Instan |
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} |
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func (e *Client) FetchAppInstance(ctx context.Context, appID string, instanceID string) (m Instance, err error) { |
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err = e.do(ctx, "GET", []string{"apps", appID, instanceID}, nil, &m) |
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err = e.do(ctx, http.MethodGet, []string{"apps", appID, instanceID}, nil, &m) |
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return |
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} |
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func (e *Client) FetchInstance(ctx context.Context, instanceID string) (m Instance, err error) { |
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err = e.do(ctx, "GET", []string{"instances", instanceID}, nil, &m) |
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err = e.do(ctx, http.MethodGet, []string{"instances", instanceID}, nil, &m) |
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return |
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} |
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func (e *Client) Out(ctx context.Context, appID, instanceID string) error { |
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return e.do(ctx, "PUT", []string{"apps", appID, instanceID, fmt.Sprintf("status?value=%s", statusOutOfServeice)}, nil, nil) |
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return e.do(ctx, http.MethodPut, []string{"apps", appID, instanceID, fmt.Sprintf("status?value=%s", statusOutOfService)}, nil, nil) |
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} |
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func (e *Client) Down(ctx context.Context, appID, instanceID string) error { |
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return e.do(ctx, "PUT", []string{"apps", appID, instanceID, fmt.Sprintf("status?value=%s", statusDown)}, nil, nil) |
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return e.do(ctx, http.MethodPut, []string{"apps", appID, instanceID, fmt.Sprintf("status?value=%s", statusDown)}, nil, nil) |
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} |
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func (e *Client) FetchAllUpInstances(ctx context.Context) []Instance { |
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@ -200,7 +200,7 @@ func (e *Client) Register(ctx context.Context, ep Endpoint) error { |
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} |
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func (e *Client) Deregister(ctx context.Context, appID, instanceID string) error { |
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if err := e.do(ctx, "DELETE", []string{"apps", appID, instanceID}, nil, nil); err != nil { |
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if err := e.do(ctx, http.MethodDelete, []string{"apps", appID, instanceID}, nil, nil); err != nil { |
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return err |
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} |
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go e.cancelHeartbeat(appID) |
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@ -239,7 +239,7 @@ func (e *Client) registerEndpoint(ctx context.Context, ep Endpoint) error { |
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if err != nil { |
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return err |
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} |
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return e.do(ctx, "POST", []string{"apps", ep.AppID}, bytes.NewReader(body), nil) |
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return e.do(ctx, http.MethodPost, []string{"apps", ep.AppID}, bytes.NewReader(body), nil) |
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} |
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func (e *Client) Heartbeat(ep Endpoint) { |
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@ -257,7 +257,7 @@ func (e *Client) Heartbeat(ep Endpoint) { |
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case <-e.keepalive[ep.AppID]: |
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return |
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case <-ticker.C: |
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if err := e.do(e.ctx, "PUT", []string{"apps", ep.AppID, ep.InstanceID}, nil, nil); err != nil { |
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if err := e.do(e.ctx, http.MethodPut, []string{"apps", ep.AppID, ep.InstanceID}, nil, nil); err != nil { |
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if retryCount++; retryCount > heartbeatRetry { |
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_ = e.registerEndpoint(e.ctx, ep) |
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retryCount = 0 |
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@ -268,8 +268,8 @@ func (e *Client) Heartbeat(ep Endpoint) { |
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} |
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func (e *Client) cancelHeartbeat(appID string) { |
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defer e.lock.Unlock() |
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e.lock.Lock() |
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defer e.lock.Unlock() |
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if ch, ok := e.keepalive[appID]; ok { |
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ch <- struct{}{} |
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} |
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@ -307,39 +307,50 @@ func (e *Client) buildAPI(currentTimes int, params ...string) string { |
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return strings.Join(params, "/") |
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} |
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func (e *Client) do(ctx context.Context, method string, params []string, input io.Reader, output interface{}) error { |
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for i := 0; i < e.maxRetry; i++ { |
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request, err := http.NewRequest(method, e.buildAPI(i, params...), input) |
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func (e *Client) request(ctx context.Context, method string, params []string, input io.Reader, output interface{}, i int) (bool, error) { |
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request, err := http.NewRequestWithContext(ctx, method, e.buildAPI(i, params...), input) |
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if err != nil { |
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return err |
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return false, err |
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} |
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request = request.WithContext(ctx) |
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request.Header.Add("User-Agent", "go-eureka-client") |
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request.Header.Add("Accept", "application/json;charset=UTF-8") |
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request.Header.Add("Content-Type", "application/json;charset=UTF-8") |
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resp, err := e.client.Do(request) |
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if err != nil { |
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continue |
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return true, err |
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} |
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defer func() { |
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_, _ = io.Copy(io.Discard, resp.Body) |
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resp.Body.Close() |
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_ = resp.Body.Close() |
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}() |
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if output != nil && resp.StatusCode/100 == 2 { |
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data, err := io.ReadAll(resp.Body) |
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if err != nil { |
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return err |
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return false, err |
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} |
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if err = json.Unmarshal(data, output); err != nil { |
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return err |
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err = json.Unmarshal(data, output) |
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if err != nil { |
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return false, err |
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} |
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} |
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if resp.StatusCode >= http.StatusBadRequest { |
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return fmt.Errorf("response Error %d", resp.StatusCode) |
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return false, fmt.Errorf("response Error %d", resp.StatusCode) |
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} |
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return false, nil |
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} |
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func (e *Client) do(ctx context.Context, method string, params []string, input io.Reader, output interface{}) error { |
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for i := 0; i < e.maxRetry; i++ { |
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retry, err := e.request(ctx, method, params, input, output, i) |
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if retry { |
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continue |
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} |
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if err != nil { |
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return err |
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} |
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return nil |
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} |
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return fmt.Errorf("retry after %d times", e.maxRetry) |
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FengbinShi
2 years ago