github.com/braveheart12/just@v0.8.7/network/transport/pool/connectionpool.go (about)

     1  /*
     2   * The Clear BSD License
     3   *
     4   * Copyright (c) 2019 Insolar Technologies
     5   *
     6   * All rights reserved.
     7   *
     8   * Redistribution and use in source and binary forms, with or without modification, are permitted (subject to the limitations in the disclaimer below) provided that the following conditions are met:
     9   *
    10   *  Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
    11   *  Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
    12   *  Neither the name of Insolar Technologies nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
    13   *
    14   * NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    15   *
    16   */
    17  
    18  package pool
    19  
    20  import (
    21  	"context"
    22  	"net"
    23  	"sync"
    24  
    25  	"github.com/insolar/insolar/instrumentation/inslogger"
    26  	"github.com/insolar/insolar/metrics"
    27  )
    28  
    29  type connectionPool struct {
    30  	connectionFactory connectionFactory
    31  
    32  	entryHolder entryHolder
    33  	mutex       sync.RWMutex
    34  }
    35  
    36  func newConnectionPool(connectionFactory connectionFactory) *connectionPool {
    37  	return &connectionPool{
    38  		connectionFactory: connectionFactory,
    39  
    40  		entryHolder: newEntryHolder(),
    41  	}
    42  }
    43  
    44  func (cp *connectionPool) GetConnection(ctx context.Context, address net.Addr) (net.Conn, error) {
    45  	logger := inslogger.FromContext(ctx)
    46  
    47  	entry, ok := cp.getEntry(address)
    48  
    49  	logger.Debugf("[ GetConnection ] Finding entry for connection to %s in pool: %t", address, ok)
    50  
    51  	if ok {
    52  		return entry.Open(ctx)
    53  	}
    54  
    55  	logger.Debugf("[ GetConnection ] Missing entry for connection to %s in pool ", address)
    56  	entry = cp.getOrCreateEntry(ctx, address)
    57  
    58  	return entry.Open(ctx)
    59  }
    60  
    61  func (cp *connectionPool) CloseConnection(ctx context.Context, address net.Addr) {
    62  	cp.mutex.Lock()
    63  	defer cp.mutex.Unlock()
    64  
    65  	logger := inslogger.FromContext(ctx)
    66  
    67  	entry, ok := cp.entryHolder.Get(address)
    68  	logger.Debugf("[ CloseConnection ] Finding entry for connection to %s in pool: %s", address, ok)
    69  
    70  	if ok {
    71  		entry.Close()
    72  
    73  		logger.Debugf("[ CloseConnection ] Delete entry for connection to %s from pool", address)
    74  		cp.entryHolder.Delete(address)
    75  		metrics.NetworkConnections.Dec()
    76  	}
    77  }
    78  
    79  func (cp *connectionPool) getEntry(address net.Addr) (entry, bool) {
    80  	cp.mutex.RLock()
    81  	defer cp.mutex.RUnlock()
    82  
    83  	return cp.entryHolder.Get(address)
    84  }
    85  
    86  func (cp *connectionPool) getOrCreateEntry(ctx context.Context, address net.Addr) entry {
    87  	logger := inslogger.FromContext(ctx)
    88  
    89  	cp.mutex.Lock()
    90  	defer cp.mutex.Unlock()
    91  
    92  	entry, ok := cp.entryHolder.Get(address)
    93  	logger.Debugf("[ getOrCreateEntry ] Finding entry for connection to %s in pool: %s", address, ok)
    94  
    95  	if ok {
    96  		return entry
    97  	}
    98  
    99  	logger.Debugf("[ getOrCreateEntry ] Failed to retrieve entry for connection to %s, creating it", address)
   100  
   101  	entry = newEntry(cp.connectionFactory, address, cp.CloseConnection)
   102  
   103  	cp.entryHolder.Add(address, entry)
   104  	size := cp.entryHolder.Size()
   105  	logger.Debugf(
   106  		"[ getOrCreateEntry ] Added entry for connection to %s. Current pool size: %d",
   107  		address.String(),
   108  		size,
   109  	)
   110  	metrics.NetworkConnections.Inc()
   111  
   112  	return entry
   113  }
   114  
   115  func (cp *connectionPool) Reset() {
   116  	cp.mutex.Lock()
   117  	defer cp.mutex.Unlock()
   118  
   119  	cp.entryHolder.Iterate(func(entry entry) {
   120  		entry.Close()
   121  	})
   122  	cp.entryHolder.Clear()
   123  	metrics.NetworkConnections.Set(float64(cp.entryHolder.Size()))
   124  }