Merge pull request #354 from kp2401075/paginationExample

Adding example for Pagination

Author: benjivesterby

README.md

@@ -221,6 +221,14 @@ func main() {
 	fmt.Printf("Status after transition: %+v\n", issue.Fields.Status.Name)
 }
 ```
+### Get all the issues for JQL with Pagination
+Jira API has limit on maxResults it can return. You may have a usecase where you need to get all issues for given JQL.
+This example shows reference implementation of GetAllIssues function which does pagination on Jira API to get all the issues for given JQL
+
+please look at [Pagination Example](https://github.com/andygrunwald/go-jira/blob/master/examples/pagination/main.go)
+
+
+
 
 ### Call a not implemented API endpoint
 

examples/pagination/main.go

@@ -0,0 +1,55 @@
+package main
+
+import (
+	"fmt"
+
+	jira "github.com/andygrunwald/go-jira"
+)
+
+// GetAllIssues will implement pagination of api and get all the issues.
+// Jira API has limitation as to maxResults it can return at one time.
+// You may have usecase where you need to get all the issues according to jql
+// This is where this example comes in.
+func GetAllIssues(client *jira.Client, searchString string) ([]jira.Issue, error) {
+	last := 0
+	var issues []jira.Issue
+	for {
+		opt := &jira.SearchOptions{
+			MaxResults: 1000, // Max results can go up to 1000
+			StartAt:    last,
+		}
+
+		chunk, resp, err := client.Issue.Search(searchString, opt)
+		if err != nil {
+			return nil, err
+		}
+
+		total := resp.Total
+		if issues == nil {
+			issues = make([]jira.Issue, 0, total)
+		}
+		issues = append(issues, chunk...)
+		last = resp.StartAt + len(chunk)
+		if last >= total {
+			return issues, nil
+		}
+	}
+
+}
+
+func main() {
+	jiraClient, err := jira.NewClient(nil, "https://issues.apache.org/jira/")
+	if err != nil {
+		panic(err)
+	}
+
+	jql := "project = Mesos and type = Bug and Status NOT IN (Resolved)"
+	fmt.Printf("Usecase: Running a JQL query '%s'\n", jql)
+
+	issues, err := GetAllIssues(jiraClient, jql)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println(issues)
+
+}