Showing the changes to java/pkg/sun/rmi/transport/ConnectionInputStream.java (1 of 18352 files). Show all
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| 1 | /* | ||
| 2 | * Copyright (c) 1996, 2001, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | package sun.rmi.transport; | ||
| 26 | |||
| 27 | import java.io.*; | ||
| 28 | import java.util.*; | ||
| 29 | import java.rmi.RemoteException; | ||
| 30 | import java.rmi.server.UID; | ||
| 31 | import sun.rmi.server.MarshalInputStream; | ||
| 32 | import sun.rmi.runtime.Log; | ||
| 33 | |||
| 34 | /** | ||
| 35 | * Special stream to keep track of refs being unmarshaled so that | ||
| 36 | * refs can be ref-counted locally. | ||
| 37 | * | ||
| 38 | * @author Ann Wollrath | ||
| 39 | */ | ||
| 40 | class ConnectionInputStream extends MarshalInputStream { | ||
| 41 | |||
| 42 | /** indicates whether ack is required for DGC */ | ||
| 43 | private boolean dgcAckNeeded = false; | ||
| 44 | |||
| 45 | /** Hashtable mapping Endpoints to lists of LiveRefs to register */ | ||
| 46 | private Map incomingRefTable = new HashMap(5); | ||
| 47 | |||
| 48 | /** identifier for gc ack*/ | ||
| 49 | private UID ackID; | ||
| 50 | |||
| 51 | /** | ||
| 52 | * Constructs a marshal input stream using the underlying | ||
| 53 | * stream "in". | ||
| 54 | */ | ||
| 55 | ConnectionInputStream(InputStream in) throws IOException { | ||
| 56 | super(in); | ||
| 57 | } | ||
| 58 | |||
| 59 | void readID() throws IOException { | ||
| 60 | ackID = UID.read((DataInput) this); | ||
| 61 | } | ||
| 62 | |||
| 63 | /** | ||
| 64 | * Save reference in order to send "dirty" call after all args/returns | ||
| 65 | * have been unmarshaled. Save in hashtable incomingRefTable. This | ||
| 66 | * table is keyed on endpoints, and holds objects of type | ||
| 67 | * IncomingRefTableEntry. | ||
| 68 | */ | ||
| 69 | void saveRef(LiveRef ref) { | ||
| 70 | Endpoint ep = ref.getEndpoint(); | ||
| 71 | |||
| 72 | // check whether endpoint is already in the hashtable | ||
| 73 | List refList = (List) incomingRefTable.get(ep); | ||
| 74 | |||
| 75 | if (refList == null) { | ||
| 76 | refList = new ArrayList(); | ||
| 77 | incomingRefTable.put(ep, refList); | ||
| 78 | } | ||
| 79 | |||
| 80 | // add ref to list of refs for endpoint ep | ||
| 81 | refList.add(ref); | ||
| 82 | } | ||
| 83 | |||
| 84 | /** | ||
| 85 | * Add references to DGC table (and possibly send dirty call). | ||
| 86 | * RegisterRefs now calls DGCClient.referenced on all | ||
| 87 | * refs with the same endpoint at once to achieve batching of | ||
| 88 | * calls to the DGC | ||
| 89 | */ | ||
| 90 | void registerRefs() throws IOException { | ||
| 91 | if (!incomingRefTable.isEmpty()) { | ||
| 92 | Set entrySet = incomingRefTable.entrySet(); | ||
| 93 | Iterator iter = entrySet.iterator(); | ||
| 94 | while (iter.hasNext()) { | ||
| 95 | Map.Entry entry = (Map.Entry) iter.next(); | ||
| 96 | Endpoint ep = (Endpoint) entry.getKey(); | ||
| 97 | List refList = (List) entry.getValue(); | ||
| 98 | DGCClient.registerRefs(ep, refList); | ||
| 99 | } | ||
| 100 | } | ||
| 101 | } | ||
| 102 | |||
| 103 | /** | ||
| 104 | * Indicate that an ack is required to the distributed | ||
| 105 | * collector. | ||
| 106 | */ | ||
| 107 | void setAckNeeded() { | ||
| 108 | dgcAckNeeded = true; | ||
| 109 | } | ||
| 110 | |||
| 111 | /** | ||
| 112 | * Done with input stream for remote call. Send DGC ack if necessary. | ||
| 113 | * Allow sending of ack to fail without flagging an error. | ||
| 114 | */ | ||
| 115 | void done(Connection c) { | ||
| 116 | /* | ||
| 117 | * WARNING: The connection c may have already been freed. It | ||
| 118 | * is only be safe to use c to obtain c's channel. | ||
| 119 | */ | ||
| 120 | |||
| 121 | if (dgcAckNeeded) { | ||
| 122 | Connection conn = null; | ||
| 123 | Channel ch = null; | ||
| 124 | boolean reuse = true; | ||
| 125 | |||
| 126 | DGCImpl.dgcLog.log(Log.VERBOSE, "send ack"); | ||
| 127 | |||
| 128 | try { | ||
| 129 | ch = c.getChannel(); | ||
| 130 | conn = ch.newConnection(); | ||
| 131 | DataOutputStream out = | ||
| 132 | new DataOutputStream(conn.getOutputStream()); | ||
| 133 | out.writeByte(TransportConstants.DGCAck); | ||
| 134 | if (ackID == null) { | ||
| 135 | ackID = new UID(); | ||
| 136 | } | ||
| 137 | ackID.write((DataOutput) out); | ||
| 138 | conn.releaseOutputStream(); | ||
| 139 | |||
| 140 | /* | ||
| 141 | * Fix for 4221173: if this connection is on top of an | ||
| 142 | * HttpSendSocket, the DGCAck won't actually get sent until a | ||
| 143 | * read operation is attempted on the socket. Calling | ||
| 144 | * available() is the most innocuous way of triggering the | ||
| 145 | * write. | ||
| 146 | */ | ||
| 147 | conn.getInputStream().available(); | ||
| 148 | conn.releaseInputStream(); | ||
| 149 | } catch (RemoteException e) { | ||
| 150 | reuse = false; | ||
| 151 | } catch (IOException e) { | ||
| 152 | reuse = false; | ||
| 153 | } | ||
| 154 | try { | ||
| 155 | if (conn != null) | ||
| 156 | ch.free(conn, reuse); | ||
| 157 | } catch (RemoteException e){ | ||
| 158 | // eat exception | ||
| 159 | } | ||
| 160 | } | ||
| 161 | } | ||
| 162 | } | ||