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path: root/vendor/github.com/uber/jaeger-client-go/thrift/transport_exception.go
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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package thrift

import (
    "errors"
    "io"
)

type timeoutable interface {
    Timeout() bool
}

// Thrift Transport exception
type TTransportException interface {
    TException
    TypeId() int
    Err() error
}

const (
    UNKNOWN_TRANSPORT_EXCEPTION = 0
    NOT_OPEN                    = 1
    ALREADY_OPEN                = 2
    TIMED_OUT                   = 3
    END_OF_FILE                 = 4
)

type tTransportException struct {
    typeId int
    err    error
}

func (p *tTransportException) TypeId() int {
    return p.typeId
}

func (p *tTransportException) Error() string {
    return p.err.Error()
}

func (p *tTransportException) Err() error {
    return p.err
}

func NewTTransportException(t int, e string) TTransportException {
    return &tTransportException{typeId: t, err: errors.New(e)}
}

func NewTTransportExceptionFromError(e error) TTransportException {
    if e == nil {
        return nil
    }

    if t, ok := e.(TTransportException); ok {
        return t
    }

    switch v := e.(type) {
    case TTransportException:
        return v
    case timeoutable:
        if v.Timeout() {
            return &tTransportException{typeId: TIMED_OUT, err: e}
        }
    }

    if e == io.EOF {
        return &tTransportException{typeId: END_OF_FILE, err: e}
    }

    return &tTransportException{typeId: UNKNOWN_TRANSPORT_EXCEPTION, err: e}
}