| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| Connection |
|
| 1.0;1 |
| 1 | /* | |
| 2 | * #%L | |
| 3 | * Connection.java - mongodb-async-driver - Allanbank Consulting, Inc. | |
| 4 | * %% | |
| 5 | * Copyright (C) 2011 - 2014 Allanbank Consulting, Inc. | |
| 6 | * %% | |
| 7 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
| 8 | * you may not use this file except in compliance with the License. | |
| 9 | * You may obtain a copy of the License at | |
| 10 | * | |
| 11 | * http://www.apache.org/licenses/LICENSE-2.0 | |
| 12 | * | |
| 13 | * Unless required by applicable law or agreed to in writing, software | |
| 14 | * distributed under the License is distributed on an "AS IS" BASIS, | |
| 15 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 16 | * See the License for the specific language governing permissions and | |
| 17 | * limitations under the License. | |
| 18 | * #L% | |
| 19 | */ | |
| 20 | package com.allanbank.mongodb.client.connection; | |
| 21 | ||
| 22 | import java.beans.PropertyChangeListener; | |
| 23 | import java.io.Closeable; | |
| 24 | import java.io.Flushable; | |
| 25 | import java.util.concurrent.TimeUnit; | |
| 26 | ||
| 27 | import com.allanbank.mongodb.MongoDbException; | |
| 28 | import com.allanbank.mongodb.client.Message; | |
| 29 | import com.allanbank.mongodb.client.callback.ReplyCallback; | |
| 30 | ||
| 31 | /** | |
| 32 | * Provides the lowest level interface for interacting with a MongoDB server. | |
| 33 | * The method provided here are a straight forward mapping from the <a href= | |
| 34 | * "http://www.mongodb.org/display/DOCS/Mongo+Wire+Protocol">MongoDB Wire | |
| 35 | * Protocol</a>. | |
| 36 | * | |
| 37 | * @api.no This class is <b>NOT</b> part of the drivers API. This class may be | |
| 38 | * mutated in incompatible ways between any two releases of the driver. | |
| 39 | * @copyright 2011-2014, Allanbank Consulting, Inc., All Rights Reserved | |
| 40 | */ | |
| 41 | public interface Connection extends Closeable, Flushable { | |
| 42 | ||
| 43 | /** The collection to use when issuing commands to the database. */ | |
| 44 | public static final String COMMAND_COLLECTION = "$cmd"; | |
| 45 | ||
| 46 | /** The property for if the connection is open or not. */ | |
| 47 | public static final String OPEN_PROP_NAME = "open"; | |
| 48 | ||
| 49 | /** | |
| 50 | * Adds a {@link PropertyChangeListener} to this connection. Events are | |
| 51 | * fired as the state of the connection changes. | |
| 52 | * | |
| 53 | * @param listener | |
| 54 | * The listener for the change events. | |
| 55 | */ | |
| 56 | public void addPropertyChangeListener(PropertyChangeListener listener); | |
| 57 | ||
| 58 | /** | |
| 59 | * Returns the number of messages that are pending responses from the | |
| 60 | * server. | |
| 61 | * | |
| 62 | * @return The number of messages pending responses from the server. | |
| 63 | */ | |
| 64 | public int getPendingCount(); | |
| 65 | ||
| 66 | /** | |
| 67 | * Returns the name of a server the connection is currently connected to. | |
| 68 | * | |
| 69 | * @return The name of a server the connection is currently connected to. | |
| 70 | */ | |
| 71 | public String getServerName(); | |
| 72 | ||
| 73 | /** | |
| 74 | * Returns true if the connection is open and not shutting down, false | |
| 75 | * otherwise. | |
| 76 | * | |
| 77 | * @return True if the connection is open and not shutting down, false | |
| 78 | * otherwise. | |
| 79 | */ | |
| 80 | public boolean isAvailable(); | |
| 81 | ||
| 82 | /** | |
| 83 | * Determines if the connection is idle. | |
| 84 | * | |
| 85 | * @return True if the connection is waiting for messages to send and has no | |
| 86 | * outstanding messages to receive. | |
| 87 | */ | |
| 88 | public boolean isIdle(); | |
| 89 | ||
| 90 | /** | |
| 91 | * Determines if the connection is open. | |
| 92 | * | |
| 93 | * @return True if the connection is open and thinks it can send messages. | |
| 94 | */ | |
| 95 | public boolean isOpen(); | |
| 96 | ||
| 97 | /** | |
| 98 | * Returns true if the connection is being gracefully closed, false | |
| 99 | * otherwise. | |
| 100 | * | |
| 101 | * @return True if the connection is being gracefully closed, false | |
| 102 | * otherwise. | |
| 103 | */ | |
| 104 | public boolean isShuttingDown(); | |
| 105 | ||
| 106 | /** | |
| 107 | * Notifies the call backs for the pending and optionally the to be sent | |
| 108 | * messages that there has been an external, unrecoverable error. | |
| 109 | * | |
| 110 | * @param exception | |
| 111 | * The error condition. | |
| 112 | */ | |
| 113 | public void raiseErrors(MongoDbException exception); | |
| 114 | ||
| 115 | /** | |
| 116 | * Removes a {@link PropertyChangeListener} from this connection. | |
| 117 | * | |
| 118 | * @param listener | |
| 119 | * The listener for the change events. | |
| 120 | */ | |
| 121 | public void removePropertyChangeListener(PropertyChangeListener listener); | |
| 122 | ||
| 123 | /** | |
| 124 | * Sends a message on the connection. | |
| 125 | * | |
| 126 | * @param message1 | |
| 127 | * The first message to send on the connection. | |
| 128 | * @param message2 | |
| 129 | * The second message to send on the connection. | |
| 130 | * @param replyCallback | |
| 131 | * The callback to notify of responses to the {@code message2}. | |
| 132 | * May be <code>null</code>. | |
| 133 | * @throws MongoDbException | |
| 134 | * On an error sending the message. | |
| 135 | */ | |
| 136 | public void send(Message message1, Message message2, | |
| 137 | ReplyCallback replyCallback) throws MongoDbException; | |
| 138 | ||
| 139 | /** | |
| 140 | * Sends a message on the connection. | |
| 141 | * | |
| 142 | * @param message | |
| 143 | * The message to send on the connection. | |
| 144 | * @param replyCallback | |
| 145 | * The callback to notify of responses to the messages. May be | |
| 146 | * <code>null</code>. | |
| 147 | * @throws MongoDbException | |
| 148 | * On an error sending the message. | |
| 149 | */ | |
| 150 | public void send(Message message, ReplyCallback replyCallback) | |
| 151 | throws MongoDbException; | |
| 152 | ||
| 153 | /** | |
| 154 | * Notifies the connection that once all outstanding requests have been sent | |
| 155 | * and all replies received the Connection should be closed. This method | |
| 156 | * will return prior to the connection being closed. | |
| 157 | * | |
| 158 | * @param force | |
| 159 | * If true then the connection can be immediately closed as the | |
| 160 | * caller knows there are no outstanding requests to the server. | |
| 161 | */ | |
| 162 | public void shutdown(boolean force); | |
| 163 | ||
| 164 | /** | |
| 165 | * Waits for the connection to become idle. | |
| 166 | * | |
| 167 | * @param timeout | |
| 168 | * The amount of time to wait for the connection to become idle. | |
| 169 | * @param timeoutUnits | |
| 170 | * The units for the amount of time to wait for the connection to | |
| 171 | * become idle. | |
| 172 | */ | |
| 173 | public void waitForClosed(int timeout, TimeUnit timeoutUnits); | |
| 174 | } |