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-rw-r--r--vendor/github.com/minio/minio-go/v7/retry-continous.go69
1 files changed, 69 insertions, 0 deletions
diff --git a/vendor/github.com/minio/minio-go/v7/retry-continous.go b/vendor/github.com/minio/minio-go/v7/retry-continous.go
new file mode 100644
index 00000000..3d25883b
--- /dev/null
+++ b/vendor/github.com/minio/minio-go/v7/retry-continous.go
@@ -0,0 +1,69 @@
+/*
+ * MinIO Go Library for Amazon S3 Compatible Cloud Storage
+ * Copyright 2015-2017 MinIO, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package minio
+
+import "time"
+
+// newRetryTimerContinous creates a timer with exponentially increasing delays forever.
+func (c Client) newRetryTimerContinous(unit time.Duration, cap time.Duration, jitter float64, doneCh chan struct{}) <-chan int {
+ attemptCh := make(chan int)
+
+ // normalize jitter to the range [0, 1.0]
+ if jitter < NoJitter {
+ jitter = NoJitter
+ }
+ if jitter > MaxJitter {
+ jitter = MaxJitter
+ }
+
+ // computes the exponential backoff duration according to
+ // https://www.awsarchitectureblog.com/2015/03/backoff.html
+ exponentialBackoffWait := func(attempt int) time.Duration {
+ // 1<<uint(attempt) below could overflow, so limit the value of attempt
+ maxAttempt := 30
+ if attempt > maxAttempt {
+ attempt = maxAttempt
+ }
+ //sleep = random_between(0, min(cap, base * 2 ** attempt))
+ sleep := unit * time.Duration(1<<uint(attempt))
+ if sleep > cap {
+ sleep = cap
+ }
+ if jitter != NoJitter {
+ sleep -= time.Duration(c.random.Float64() * float64(sleep) * jitter)
+ }
+ return sleep
+ }
+
+ go func() {
+ defer close(attemptCh)
+ var nextBackoff int
+ for {
+ select {
+ // Attempts starts.
+ case attemptCh <- nextBackoff:
+ nextBackoff++
+ case <-doneCh:
+ // Stop the routine.
+ return
+ }
+ time.Sleep(exponentialBackoffWait(nextBackoff))
+ }
+ }()
+ return attemptCh
+}