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 0000000..bfeea95
--- /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, 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
+}