/
main.go
140 lines (119 loc) · 3.59 KB
/
main.go
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// This example demonstrates soft deleting and hard deleting a stream.
// The example will write an event to a stream then soft delete the stream.
// After this a new event will be written to the soft deleted stream and the
// stream will be undeleted. The stream will then be hard deleted and a subsequent
// request to the stream will be shown to fail.
package main
import (
"log"
"net/http"
"github.com/jetbasrawi/go.geteventstore"
)
// FooEvent is an example event
type FooEvent struct {
Foo string
}
func main() {
// Create a new client
client, err := goes.NewClient(nil, "http://localhost:2113")
if err != nil {
log.Fatal(err)
}
streamName := goes.NewUUID()
log.Println("1. Write an event to a new stream.")
writer := client.NewStreamWriter(streamName)
ev1 := goes.NewEvent("", "", &FooEvent{"Event 1"}, nil)
err = writer.Append(nil, ev1)
if err != nil {
log.Fatal(err)
}
count := 0
log.Println("2. Read the event back. There should be one event in the stream.")
reader := client.NewStreamReader(streamName)
for reader.Next() {
if reader.Err() != nil {
if e, ok := reader.Err().(*goes.ErrNoMoreEvents); !ok {
log.Fatal(e)
}
if count == 1 {
log.Println(" - The stream contains one event.")
break
} else {
log.Fatal(" - The stream contains an unexpected number of events.")
}
} else {
count++
}
}
log.Println("3. Soft Delete the stream.")
resp, err := client.DeleteStream(streamName, false)
if err != nil {
log.Fatal(err)
}
log.Println("4. Check that the stream has been soft deleted.")
// The status code returned should be a 204 No Content
if resp.StatusCode == http.StatusNoContent {
log.Println(" - The stream has been soft deleted.")
} else {
log.Fatal(resp.Status)
}
log.Println("5. Try to read the soft deleted stream.")
// This should result in an ErrNotFound.
reader = client.NewStreamReader(streamName)
for reader.Next() {
if reader.Err() != nil {
if e, ok := reader.Err().(*goes.ErrNotFound); !ok {
log.Fatal(e)
}
log.Println(" - As expected, the stream is not found.")
break
}
}
log.Println("6. Write a second event to the soft deleted stream. The stream should be undeleted.")
// This should result in the stream being undeleted and the second event
// being appended to the stream.
ev2 := goes.NewEvent("", "", &FooEvent{"Event 2"}, nil)
err = writer.Append(nil, ev2)
if err != nil {
log.Fatal(err)
}
log.Println("7. Read the events in the stream. There should be two events.")
reader = client.NewStreamReader(streamName)
for reader.Next() {
if reader.Err() != nil {
if e, ok := reader.Err().(*goes.ErrNotFound); ok {
log.Fatal(e)
}
if count == 2 {
log.Printf(" - The deleted stream has been undeleted and contains two events.")
break
} else {
log.Fatal(" - The number of events found is not correct.")
}
} else {
count++
}
}
log.Println("8. Hard delete the stream")
resp, err = client.DeleteStream(streamName, true)
if err != nil {
log.Fatal(err)
}
// Check that the status code returned is a 204 No Content.
if resp.StatusCode == http.StatusNoContent {
log.Println(" - The stream has been hard deleted.")
} else {
log.Fatal(resp.Status)
}
log.Println("9. Try to write to the hard deleted stream. This should result in an ErrDeleted")
ev3 := goes.NewEvent("", "", &FooEvent{"Event 3"}, nil)
err = writer.Append(nil, ev3)
if err != nil {
if _, ok := err.(*goes.ErrDeleted); ok {
log.Println(" - As expected, an attempt to write to the hard deleted stream fails.")
} else {
log.Fatal(err)
}
}
log.Println("10. The example has completed successfully.")
}