Showing the changes to java/pkg/sun/rmi/transport/ConnectionOutputStream.java (1 of 18352 files). Show all
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| 1 | +/* | |
| 2 | + * Copyright (c) 1996, 2005, 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 | + | |
| 26 | +package sun.rmi.transport; | |
| 27 | + | |
| 28 | +import java.io.IOException; | |
| 29 | +import java.rmi.server.UID; | |
| 30 | +import sun.rmi.server.MarshalOutputStream; | |
| 31 | + | |
| 32 | +/** | |
| 33 | + * Special stream to keep track of refs being marshaled as return | |
| 34 | + * results to determine whether a special ack needs to be sent | |
| 35 | + * to the distributed collector. | |
| 36 | + * | |
| 37 | + * @author Ann Wollrath | |
| 38 | + */ | |
| 39 | +class ConnectionOutputStream extends MarshalOutputStream { | |
| 40 | + | |
| 41 | + /** connection associated with ConnectionOutputStream */ | |
| 42 | + private final Connection conn; | |
| 43 | + /** indicates whether output stream is used to marshal results */ | |
| 44 | + private final boolean resultStream; | |
| 45 | + /** identifier for gc ack*/ | |
| 46 | + private final UID ackID; | |
| 47 | + | |
| 48 | + /** to store refs to returned remote object until DGC ack is received */ | |
| 49 | + private DGCAckHandler dgcAckHandler = null; | |
| 50 | + | |
| 51 | + /** | |
| 52 | + * Constructs an marshal output stream using the underlying | |
| 53 | + * stream associated with the connection, the parameter c. | |
| 54 | + * @param c is the Connection object associated with the | |
| 55 | + * ConnectionOutputStream object being constructed | |
| 56 | + * @param resultStream indicates whether this stream is used | |
| 57 | + * to marshal return results | |
| 58 | + */ | |
| 59 | + ConnectionOutputStream(Connection conn, boolean resultStream) | |
| 60 | + throws IOException | |
| 61 | + { | |
| 62 | + super(conn.getOutputStream()); | |
| 63 | + this.conn = conn; | |
| 64 | + this.resultStream = resultStream; | |
| 65 | + ackID = resultStream ? new UID() : null; | |
| 66 | + } | |
| 67 | + | |
| 68 | + void writeID() throws IOException { | |
| 69 | + assert resultStream; | |
| 70 | + ackID.write(this); | |
| 71 | + } | |
| 72 | + | |
| 73 | + /** | |
| 74 | + * Returns true if this output stream is used to marshal return | |
| 75 | + * results; otherwise returns false. | |
| 76 | + */ | |
| 77 | + boolean isResultStream() { | |
| 78 | + return resultStream; | |
| 79 | + } | |
| 80 | + | |
| 81 | + /** | |
| 82 | + * Saves a reference to the specified object in this stream's | |
| 83 | + * DGCAckHandler. | |
| 84 | + **/ | |
| 85 | + void saveObject(Object obj) { | |
| 86 | + // should always be accessed from same thread | |
| 87 | + if (dgcAckHandler == null) { | |
| 88 | + dgcAckHandler = new DGCAckHandler(ackID); | |
| 89 | + } | |
| 90 | + dgcAckHandler.add(obj); | |
| 91 | + } | |
| 92 | + | |
| 93 | + /** | |
| 94 | + * Returns this stream's DGCAckHandler, or null if it doesn't have | |
| 95 | + * one (saveObject was not invoked). This method should only be | |
| 96 | + * invoked after all objects have been written to the stream, | |
| 97 | + * because future objects written may yet cause a DGCAckHandler to | |
| 98 | + * be created (by invoking saveObject). | |
| 99 | + **/ | |
| 100 | + DGCAckHandler getDGCAckHandler() { | |
| 101 | + return dgcAckHandler; | |
| 102 | + } | |
| 103 | + | |
| 104 | + void done() { | |
| 105 | + if (dgcAckHandler != null) { | |
| 106 | + dgcAckHandler.startTimer(); | |
| 107 | + } | |
| 108 | + } | |
| 109 | +} | |