The same models are shared among requests, so, it's not one model per request, or one per user or something similar.

Let's imagine that loading the model can **take quite some time**, because it has to read a lot of **data from disk**. So you don't want to do it for every request.

        for (Exchange exchange : exchanges) {
            exchange.process(transferEvent -> {
                TransferEvent.EventType type = transferEvent.getType();
                try {
                    switch (type) {
                        case INITIATED:
                            delegate.transferInitiated(transferEvent);
                            break;
                        case STARTED:

// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package cmd

import (
	"context"
	"fmt"
	"io"
)

// Writes to multiple writers
type multiWriter struct {
	writers     []io.Writer
	writeQuorum int
	errs        []error
}

// Write writes data to writers.
func (p *multiWriter) Write(ctx context.Context, blocks [][]byte) error {

const (
	offline = iota
	online
	closed
)

// NetworkError - error type in case of errors related to http/transport
// for ex. connection refused, connection reset, dns resolution failure etc.
// All errors returned by storage-rest-server (ex errFileNotFound, errDiskNotFound) are not considered to be network errors.
type NetworkError struct {
	Err error
}

func (n *NetworkError) Error() string {

But you can also declare the `Response` that you want to be used (e.g. any `Response` subclass), in the *path operation decorator* using the `response_class` parameter.

// BatchKeyRotationType defines key rotation type
type BatchKeyRotationType string

const (
	sses3  BatchKeyRotationType = "sse-s3"
	ssekms BatchKeyRotationType = "sse-kms"
)

// BatchJobKeyRotateEncryption defines key rotation encryption options passed
type BatchJobKeyRotateEncryption struct {
	Type       BatchKeyRotationType `yaml:"type" json:"type"`
	Key        string               `yaml:"key" json:"key"`

    for (Type type : getGenericExceptionTypes()) {
      // getGenericExceptionTypes() will never return a type that's not exception
      @SuppressWarnings("unchecked")
      TypeToken<? extends Throwable> exceptionType =
          (TypeToken<? extends Throwable>) TypeToken.of(type);
      builder.add(exceptionType);
    }
    return builder.build();
  }

  // List attributes of available devices
  virtual void ListDevices(std::vector<DeviceAttributes>* devices) = 0;

  // Add `devices` into context's device manager. Context's device manager
  // will take ownership and maintain devices' lifetime.
  virtual absl::Status AddDevices(
      std::vector<std::unique_ptr<Device>> devices) = 0;

  // Block until all pending nodes are finished.

      ParallelTensor::FromTensorHandles(parallel_device,
                                        std::move(mixed_handles), status.get());
  ASSERT_TRUE(TF_GetCode(status.get()) == TF_OK);
  // Can't take the shape of a parallel tensor with varying numbers of axes, but
  // running operations on them is OK.
  TF_ASSERT_OK(unknown_length_vector->Shape(&shape));
  EXPECT_THAT(*shape, ElementsAre(-1));

func (db *DB) Select(query interface{}, args ...interface{}) (tx *DB) {
	tx = db.getInstance()

	switch v := query.(type) {
	case []string:
		tx.Statement.Selects = v

		for _, arg := range args {
			switch arg := arg.(type) {
			case string:
				tx.Statement.Selects = append(tx.Statement.Selects, arg)
			case []string:
				tx.Statement.Selects = append(tx.Statement.Selects, arg...)