Update license headers for Dgraph Community License files. (#2794)

* Rename backup_oss.go -> backup.go
* Rename backup.go -> backup_ee.go

ee/backup/backup.go

@@ -1,7 +1,7 @@
 // +build !oss
 
 /*
- * Copyright 2018 Dgraph Labs, Inc. All rights reserved.
+ * Copyright 2018 Dgraph Labs, Inc. and Contributors
  *
  * Licensed under the Dgraph Community License (the "License"); you
  * may not use this file except in compliance with the License. You

ee/backup/file_handler.go

@@ -1,7 +1,7 @@
 // +build !oss
 
 /*
- * Copyright 2018 Dgraph Labs, Inc. All rights reserved.
+ * Copyright 2018 Dgraph Labs, Inc. and Contributors
  *
  * Licensed under the Dgraph Community License (the "License"); you
  * may not use this file except in compliance with the License. You

ee/backup/s3_handler.go

@@ -1,7 +1,7 @@
 // +build !oss
 
 /*
- * Copyright 2018 Dgraph Labs, Inc. All rights reserved.
+ * Copyright 2018 Dgraph Labs, Inc. and Contributors
  *
  * Licensed under the Dgraph Community License (the "License"); you
  * may not use this file except in compliance with the License. You

ee/backup/writer.go

@@ -1,7 +1,7 @@
 // +build !oss
 
 /*
- * Copyright 2018 Dgraph Labs, Inc. All rights reserved.
+ * Copyright 2018 Dgraph Labs, Inc. and Contributors
  *
  * Licensed under the Dgraph Community License (the "License"); you
  * may not use this file except in compliance with the License. You

worker/backup.go

@@ -1,4 +1,4 @@
-// +build !oss
+// +build oss
 
 /*
  * Copyright 2018 Dgraph Labs, Inc. and Contributors
@@ -19,125 +19,23 @@
 package worker
 
 import (
-	"time"
+	"errors"
 
-	"github.com/dgraph-io/dgraph/ee/backup"
-	"github.com/dgraph-io/dgraph/posting"
 	"github.com/dgraph-io/dgraph/protos/pb"
 	"github.com/dgraph-io/dgraph/x"
-
 	"github.com/golang/glog"
 	"golang.org/x/net/context"
 )
 
-func backupProcess(ctx context.Context, req *pb.BackupRequest) error {
-	glog.Infof("Backup request: group %d at %d", req.GroupId, req.ReadTs)
-	if err := ctx.Err(); err != nil {
-		glog.Errorf("Context error during backup: %v\n", err)
-		return err
-	}
-	// sanity, make sure this is our group.
-	if groups().groupId() != req.GroupId {
-		return x.Errorf("Backup request group mismatch. Mine: %d. Requested: %d\n",
-			groups().groupId(), req.GroupId)
-	}
-	// wait for this node to catch-up.
-	if err := posting.Oracle().WaitForTs(ctx, req.ReadTs); err != nil {
-		return err
-	}
-	// create backup request and process it.
-	br := &backup.Request{DB: pstore, Backup: req}
-	// calculate estimated upload size
-	for _, t := range groups().tablets {
-		if t.GroupId == req.GroupId {
-			br.Sizex += uint64(float64(t.Space) * 1.2)
-		}
-	}
-	return br.Process(ctx)
-}
+var errNotSupported = errors.New("Feature available only in Dgraph Enterprise Edition.")
 
-// Backup handles a request coming from another node.
+// Backup implements the Worker interface.
 func (w *grpcWorker) Backup(ctx context.Context, req *pb.BackupRequest) (*pb.Status, error) {
-	var resp pb.Status
-	glog.V(2).Infof("Received backup request via Grpc: %+v", req)
-	if err := backupProcess(ctx, req); err != nil {
-		resp.Code = -1
-		resp.Msg = err.Error()
-		return &resp, err
-	}
-	return &resp, nil
-}
-
-func backupGroup(ctx context.Context, in pb.BackupRequest) error {
-	glog.V(2).Infof("Sending backup request: %+v\n", in)
-	// this node is part of the group, process backup.
-	if groups().groupId() == in.GroupId {
-		return backupProcess(ctx, &in)
-	}
-
-	// send request to any node in the group.
-	pl := groups().AnyServer(in.GroupId)
-	if pl == nil {
-		return x.Errorf("Couldn't find a server in group %d", in.GroupId)
-	}
-	status, err := pb.NewWorkerClient(pl.Get()).Backup(ctx, &in)
-	if err != nil {
-		glog.Errorf("Backup error group %d: %s", in.GroupId, err)
-		return err
-	}
-	if status.Code != 0 {
-		err := x.Errorf("Backup error group %d: %s", in.GroupId, status.Msg)
-		glog.Errorln(err)
-		return err
-	}
-	glog.V(2).Infof("Backup request to gid=%d. OK\n", in.GroupId)
-	return nil
+	glog.Infof("Backup failed: %s", errNotSupported)
+	return &pb.Status{}, nil
 }
 
 // BackupOverNetwork handles a request coming from an HTTP client.
 func BackupOverNetwork(pctx context.Context, target string) error {
-	ctx, cancel := context.WithCancel(pctx)
-	defer cancel()
-
-	// Check that this node can accept requests.
-	if err := x.HealthCheck(); err != nil {
-		glog.Errorf("Backup canceled, not ready to accept requests: %s", err)
-		return err
-	}
-
-	// Get ReadTs from zero and wait for stream to catch up.
-	ts, err := Timestamps(ctx, &pb.Num{ReadOnly: true})
-	if err != nil {
-		glog.Errorf("Unable to retrieve readonly timestamp for backup: %s", err)
-		return err
-	}
-
-	gids := groups().KnownGroups()
-	req := pb.BackupRequest{
-		ReadTs: ts.ReadOnly,
-		Target: target,
-		UnixTs: time.Now().UTC().Format("20060102.1504"),
-	}
-	glog.Infof("Created backup request: %+v. Groups=%v\n", req, gids)
-
-	// This will dispatch the request to all groups and wait for their response.
-	// If we receive any failures, we cancel the process.
-	errCh := make(chan error, 1)
-	for _, gid := range gids {
-		req.GroupId = gid
-		go func() {
-			errCh <- backupGroup(ctx, req)
-		}()
-	}
-
-	for i := 0; i < len(gids); i++ {
-		err := <-errCh
-		if err != nil {
-			glog.Errorf("Error received during backup: %v", err)
-			return err
-		}
-	}
-	req.GroupId = 0
-	glog.Infof("Backup for req: %+v. OK.\n", req)
-	return nil
+	return x.Errorf("Backup failed: %s", errNotSupported)
 }

worker/backup_ee.go

@@ -0,0 +1,137 @@
+// +build !oss
+
+/*
+ * Copyright 2018 Dgraph Labs, Inc. and Contributors
+ *
+ * Licensed under the Dgraph Community License (the "License"); you
+ * may not use this file except in compliance with the License. You
+ * may obtain a copy of the License at
+ *
+ *     https://github.com/dgraph-io/dgraph/blob/master/licenses/DCL.txt
+ */
+
+package worker
+
+import (
+	"time"
+
+	"github.com/dgraph-io/dgraph/ee/backup"
+	"github.com/dgraph-io/dgraph/posting"
+	"github.com/dgraph-io/dgraph/protos/pb"
+	"github.com/dgraph-io/dgraph/x"
+
+	"github.com/golang/glog"
+	"golang.org/x/net/context"
+)
+
+func backupProcess(ctx context.Context, req *pb.BackupRequest) error {
+	glog.Infof("Backup request: group %d at %d", req.GroupId, req.ReadTs)
+	if err := ctx.Err(); err != nil {
+		glog.Errorf("Context error during backup: %v\n", err)
+		return err
+	}
+	// sanity, make sure this is our group.
+	if groups().groupId() != req.GroupId {
+		return x.Errorf("Backup request group mismatch. Mine: %d. Requested: %d\n",
+			groups().groupId(), req.GroupId)
+	}
+	// wait for this node to catch-up.
+	if err := posting.Oracle().WaitForTs(ctx, req.ReadTs); err != nil {
+		return err
+	}
+	// create backup request and process it.
+	br := &backup.Request{DB: pstore, Backup: req}
+	// calculate estimated upload size
+	for _, t := range groups().tablets {
+		if t.GroupId == req.GroupId {
+			br.Sizex += uint64(float64(t.Space) * 1.2)
+		}
+	}
+	return br.Process(ctx)
+}
+
+// Backup handles a request coming from another node.
+func (w *grpcWorker) Backup(ctx context.Context, req *pb.BackupRequest) (*pb.Status, error) {
+	var resp pb.Status
+	glog.V(2).Infof("Received backup request via Grpc: %+v", req)
+	if err := backupProcess(ctx, req); err != nil {
+		resp.Code = -1
+		resp.Msg = err.Error()
+		return &resp, err
+	}
+	return &resp, nil
+}
+
+func backupGroup(ctx context.Context, in pb.BackupRequest) error {
+	glog.V(2).Infof("Sending backup request: %+v\n", in)
+	// this node is part of the group, process backup.
+	if groups().groupId() == in.GroupId {
+		return backupProcess(ctx, &in)
+	}
+
+	// send request to any node in the group.
+	pl := groups().AnyServer(in.GroupId)
+	if pl == nil {
+		return x.Errorf("Couldn't find a server in group %d", in.GroupId)
+	}
+	status, err := pb.NewWorkerClient(pl.Get()).Backup(ctx, &in)
+	if err != nil {
+		glog.Errorf("Backup error group %d: %s", in.GroupId, err)
+		return err
+	}
+	if status.Code != 0 {
+		err := x.Errorf("Backup error group %d: %s", in.GroupId, status.Msg)
+		glog.Errorln(err)
+		return err
+	}
+	glog.V(2).Infof("Backup request to gid=%d. OK\n", in.GroupId)
+	return nil
+}
+
+// BackupOverNetwork handles a request coming from an HTTP client.
+func BackupOverNetwork(pctx context.Context, target string) error {
+	ctx, cancel := context.WithCancel(pctx)
+	defer cancel()
+
+	// Check that this node can accept requests.
+	if err := x.HealthCheck(); err != nil {
+		glog.Errorf("Backup canceled, not ready to accept requests: %s", err)
+		return err
+	}
+
+	// Get ReadTs from zero and wait for stream to catch up.
+	ts, err := Timestamps(ctx, &pb.Num{ReadOnly: true})
+	if err != nil {
+		glog.Errorf("Unable to retrieve readonly timestamp for backup: %s", err)
+		return err
+	}
+
+	gids := groups().KnownGroups()
+	req := pb.BackupRequest{
+		ReadTs: ts.ReadOnly,
+		Target: target,
+		UnixTs: time.Now().UTC().Format("20060102.1504"),
+	}
+	glog.Infof("Created backup request: %+v. Groups=%v\n", req, gids)
+
+	// This will dispatch the request to all groups and wait for their response.
+	// If we receive any failures, we cancel the process.
+	errCh := make(chan error, 1)
+	for _, gid := range gids {
+		req.GroupId = gid
+		go func() {
+			errCh <- backupGroup(ctx, req)
+		}()
+	}
+
+	for i := 0; i < len(gids); i++ {
+		err := <-errCh
+		if err != nil {
+			glog.Errorf("Error received during backup: %v", err)
+			return err
+		}
+	}
+	req.GroupId = 0
+	glog.Infof("Backup for req: %+v. OK.\n", req)
+	return nil
+}