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240 lines
8.6 KiB
240 lines
8.6 KiB
// Copyright 2019 HAProxy Technologies
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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package handlers
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import (
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"strings"
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"sync"
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"github.com/go-openapi/runtime/middleware"
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client_native "github.com/haproxytech/client-native/v6"
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"github.com/haproxytech/client-native/v6/models"
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cn "github.com/haproxytech/dataplaneapi/client-native"
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"github.com/haproxytech/dataplaneapi/haproxy"
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"github.com/haproxytech/dataplaneapi/misc"
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"github.com/haproxytech/dataplaneapi/operations/transactions"
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"github.com/haproxytech/dataplaneapi/rate"
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)
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// RateLimitedStartTransactionHandlerImpl decorates StartTransactionHandlerImpl with the rate limiting logic
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type RateLimitedStartTransactionHandlerImpl struct {
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TransactionCounter rate.Threshold
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Handler transactions.StartTransactionHandler
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}
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// StartTransactionHandlerImpl implementation of the StartTransactionHandler interface using client-native client
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type StartTransactionHandlerImpl struct {
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Client client_native.HAProxyClient
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}
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// DeleteTransactionHandlerImpl implementation of the DeleteTransactionHandler interface using client-native client
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type DeleteTransactionHandlerImpl struct {
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Client client_native.HAProxyClient
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}
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// GetTransactionHandlerImpl implementation of the GetTransactionHandler interface using client-native client
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type GetTransactionHandlerImpl struct {
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Client client_native.HAProxyClient
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}
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// GetTransactionsHandlerImpl implementation of the GetTransactionsHandler interface using client-native client
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type GetTransactionsHandlerImpl struct {
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Client client_native.HAProxyClient
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}
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// CommitTransactionHandlerImpl implementation of the CommitTransactionHandlerImpl interface using client-native client
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type CommitTransactionHandlerImpl struct {
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Client client_native.HAProxyClient
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ReloadAgent haproxy.IReloadAgent
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Mutex *sync.Mutex
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}
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// Handle executing the request and returning a response
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func (h *StartTransactionHandlerImpl) Handle(params transactions.StartTransactionParams, principal interface{}) middleware.Responder {
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configuration, err := h.Client.Configuration()
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if err != nil {
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e := misc.HandleError(err)
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return transactions.NewStartTransactionDefault(int(*e.Code)).WithPayload(e)
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}
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t, err := configuration.StartTransaction(params.Version)
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if err != nil {
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e := misc.HandleError(err)
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return transactions.NewStartTransactionDefault(int(*e.Code)).WithPayload(e)
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}
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return transactions.NewStartTransactionCreated().WithPayload(t)
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}
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// Handle executing the request and returning a response
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func (h *DeleteTransactionHandlerImpl) Handle(params transactions.DeleteTransactionParams, principal interface{}) middleware.Responder {
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configuration, err := h.Client.Configuration()
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if err != nil {
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e := misc.HandleError(err)
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return transactions.NewDeleteTransactionDefault(int(*e.Code)).WithPayload(e)
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}
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err = configuration.DeleteTransaction(params.ID)
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if err != nil {
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e := misc.HandleError(err)
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if strings.HasSuffix(*e.Message, "does not exist") {
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e.Code = misc.Int64P(404)
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return transactions.NewDeleteTransactionNotFound().WithPayload(e)
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}
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return transactions.NewDeleteTransactionDefault(int(*e.Code)).WithPayload(e)
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}
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return transactions.NewDeleteTransactionNoContent()
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}
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// Handle executing the request and returning a response
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func (h *GetTransactionHandlerImpl) Handle(params transactions.GetTransactionParams, principal interface{}) middleware.Responder {
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configuration, err := h.Client.Configuration()
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if err != nil {
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e := misc.HandleError(err)
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return transactions.NewGetTransactionDefault(int(*e.Code)).WithPayload(e)
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}
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t, err := configuration.GetTransaction(params.ID)
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if err != nil {
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e := misc.HandleError(err)
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if strings.HasSuffix(*e.Message, "does not exist") {
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e.Code = misc.Int64P(404)
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return transactions.NewDeleteTransactionNotFound().WithPayload(e)
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}
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return transactions.NewGetTransactionsDefault(int(*e.Code)).WithPayload(e)
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}
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return transactions.NewGetTransactionOK().WithPayload(t)
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}
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// Handle executing the request and returning a response
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func (h *GetTransactionsHandlerImpl) Handle(params transactions.GetTransactionsParams, principal interface{}) middleware.Responder {
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s := ""
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if params.Status != nil {
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s = *params.Status
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}
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configuration, err := h.Client.Configuration()
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if err != nil {
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e := misc.HandleError(err)
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return transactions.NewGetTransactionsDefault(int(*e.Code)).WithPayload(e)
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}
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ts, err := configuration.GetTransactions(s)
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if err != nil {
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e := misc.HandleError(err)
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return transactions.NewGetTransactionsDefault(int(*e.Code)).WithPayload(e)
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}
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return transactions.NewGetTransactionsOK().WithPayload(*ts)
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}
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// Handle executing the request and returning a response
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func (h *CommitTransactionHandlerImpl) Handle(params transactions.CommitTransactionParams, principal interface{}) middleware.Responder {
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h.Mutex.Lock()
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defer h.Mutex.Unlock()
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var err error
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var transaction *models.Transaction
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configuration, err := h.Client.Configuration()
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if err != nil {
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e := misc.HandleError(err)
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return transactions.NewCommitTransactionDefault(int(*e.Code)).WithPayload(e)
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}
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if transaction, err = configuration.GetTransaction(params.ID); err != nil {
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e := misc.HandleError(err)
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if strings.HasSuffix(*e.Message, "does not exist") {
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e.Code = misc.Int64P(404)
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return transactions.NewDeleteTransactionNotFound().WithPayload(e)
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}
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return transactions.NewCommitTransactionDefault(int(*e.Code)).WithPayload(e)
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}
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switch transaction.Status {
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case models.TransactionStatusOutdated:
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return transactions.NewCommitTransactionNotAcceptable().WithPayload(misc.OutdatedTransactionError(transaction.ID))
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case models.TransactionStatusFailed:
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return transactions.NewCommitTransactionNotAcceptable().WithPayload(misc.FailedTransactionError(transaction.ID))
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}
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// save old runtime configuration to know if the runtime client must be configured after the new configuration is
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// reloaded by HAProxy. Logic is done by cn.ReconfigureRuntime() function.
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_, globalConf, err := configuration.GetGlobalConfiguration("")
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if err != nil {
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e := misc.HandleError(err)
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return transactions.NewCommitTransactionDefault(int(*e.Code)).WithPayload(e)
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}
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runtimeAPIsOld := globalConf.RuntimeAPIs
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var t *models.Transaction
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t, err = configuration.CommitTransaction(params.ID)
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if err != nil {
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e := misc.HandleError(err)
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if strings.HasSuffix(*e.Message, "does not exist") {
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e.Code = misc.Int64P(404)
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return transactions.NewDeleteTransactionNotFound().WithPayload(e)
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}
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return transactions.NewCommitTransactionDefault(int(*e.Code)).WithPayload(e)
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}
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// Deleting outdated transactions with mismatching version ID
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var txs *models.Transactions
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txs, err = configuration.GetTransactions(models.TransactionStatusInProgress)
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if err != nil {
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e := misc.HandleError(err)
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return transactions.NewCommitTransactionDefault(int(*e.Code)).WithPayload(e)
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}
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for _, tx := range *txs {
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if tx.Version <= t.Version {
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_ = configuration.MarkTransactionOutdated(tx.ID)
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}
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}
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callbackNeeded, reconfigureFunc, err := cn.ReconfigureRuntime(h.Client, runtimeAPIsOld)
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if err != nil {
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e := misc.HandleError(err)
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return transactions.NewCommitTransactionDefault(int(*e.Code)).WithPayload(e)
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}
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if *params.ForceReload {
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if callbackNeeded {
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err = h.ReloadAgent.ForceReloadWithCallback(reconfigureFunc)
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} else {
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err = h.ReloadAgent.ForceReload()
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}
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if err != nil {
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e := misc.HandleError(err)
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return transactions.NewCommitTransactionDefault(int(*e.Code)).WithPayload(e)
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}
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return transactions.NewCommitTransactionOK().WithPayload(t)
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}
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var rID string
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if callbackNeeded {
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rID = h.ReloadAgent.ReloadWithCallback(reconfigureFunc)
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} else {
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rID = h.ReloadAgent.Reload()
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}
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return transactions.NewCommitTransactionAccepted().WithReloadID(rID).WithPayload(t)
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}
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// Handle executes the decorated Handler and, in case of successful creation, increase the counter if this is
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func (r RateLimitedStartTransactionHandlerImpl) Handle(params transactions.StartTransactionParams, principal interface{}) middleware.Responder {
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if err := r.TransactionCounter.LimitReached(); err != nil {
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e := misc.HandleError(err)
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return transactions.NewStartTransactionDefault(int(*e.Code)).WithPayload(e)
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}
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return r.Handler.Handle(params, principal)
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}
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