| 1 | /* |
| 2 | |
| 3 | Derby - Class org.apache.derby.impl.store.raw.xact.GlobalXactId |
| 4 | |
| 5 | Copyright 1998, 2004 The Apache Software Foundation or its licensors, as applicable. |
| 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 | |
| 19 | */ |
| 20 | |
| 21 | package org.apache.derby.impl.store.raw.xact; |
| 22 | |
| 23 | import org.apache.derby.iapi.services.sanity.SanityManager; |
| 24 | |
| 25 | import org.apache.derby.iapi.services.io.FormatIdUtil; |
| 26 | import org.apache.derby.iapi.services.io.StoredFormatIds; |
| 27 | import org.apache.derby.catalog.UUID; |
| 28 | |
| 29 | import org.apache.derby.iapi.store.raw.GlobalTransactionId; |
| 30 | import org.apache.derby.iapi.store.access.GlobalXact; |
| 31 | |
| 32 | import org.apache.derby.iapi.util.ByteArray; |
| 33 | |
| 34 | import java.io.ObjectOutput; |
| 35 | import java.io.ObjectInput; |
| 36 | import java.io.IOException; |
| 37 | |
| 38 | public class GlobalXactId extends GlobalXact implements GlobalTransactionId |
| 39 | { |
| 40 | /************************************************************************** |
| 41 | * Private Fields of the class |
| 42 | ************************************************************************** |
| 43 | */ |
| 44 | |
| 45 | /************************************************************************** |
| 46 | * Constructors for This class: |
| 47 | ************************************************************************** |
| 48 | */ |
| 49 | public GlobalXactId( |
| 50 | int format_id, |
| 51 | byte[] global_id, |
| 52 | byte[] branch_id) |
| 53 | { |
| 54 | this.format_id = format_id; |
| 55 | this.global_id = new byte[global_id.length]; |
| 56 | System.arraycopy(global_id, 0, this.global_id, 0, global_id.length); |
| 57 | this.branch_id = new byte[branch_id.length]; |
| 58 | System.arraycopy(branch_id, 0, this.branch_id, 0, branch_id.length); |
| 59 | } |
| 60 | |
| 61 | /************************************************************************** |
| 62 | * Public Methods of Formatable interface: |
| 63 | ************************************************************************** |
| 64 | */ |
| 65 | |
| 66 | // no-arg constructor, required by Formatable |
| 67 | public GlobalXactId() |
| 68 | { |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | Write this out. |
| 73 | @exception IOException error writing to log stream |
| 74 | */ |
| 75 | public void writeExternal(ObjectOutput out) throws IOException |
| 76 | { |
| 77 | out.writeInt(format_id); |
| 78 | |
| 79 | if (SanityManager.DEBUG) |
| 80 | { |
| 81 | SanityManager.ASSERT(global_id.length <= 64); |
| 82 | SanityManager.ASSERT(global_id != null); |
| 83 | SanityManager.ASSERT(branch_id != null); |
| 84 | } |
| 85 | |
| 86 | // write length of array followed by the array |
| 87 | out.write(global_id.length); |
| 88 | if (global_id.length > 0) |
| 89 | out.write(global_id); |
| 90 | |
| 91 | // write length of array followed by the array |
| 92 | out.write(branch_id.length); |
| 93 | if (branch_id.length > 0) |
| 94 | out.write(branch_id); |
| 95 | } |
| 96 | |
| 97 | /** |
| 98 | Read this in |
| 99 | @exception IOException error reading from log stream |
| 100 | @exception ClassNotFoundException log stream corrupted |
| 101 | */ |
| 102 | public void readExternal(ObjectInput in) |
| 103 | throws IOException, ClassNotFoundException |
| 104 | { |
| 105 | format_id = in.readInt(); |
| 106 | |
| 107 | // read global_id in from disk |
| 108 | int array_len = in.read(); |
| 109 | |
| 110 | if (SanityManager.DEBUG) |
| 111 | { |
| 112 | SanityManager.ASSERT(array_len >= 0); |
| 113 | } |
| 114 | |
| 115 | global_id = new byte[array_len]; |
| 116 | if (array_len > 0) |
| 117 | in.read(global_id); |
| 118 | |
| 119 | // read branch_id in from disk |
| 120 | array_len = in.read(); |
| 121 | |
| 122 | if (SanityManager.DEBUG) |
| 123 | { |
| 124 | SanityManager.ASSERT(array_len >= 0); |
| 125 | } |
| 126 | |
| 127 | branch_id = new byte[array_len]; |
| 128 | if (array_len > 0) |
| 129 | in.read(branch_id); |
| 130 | } |
| 131 | |
| 132 | /** |
| 133 | Return my format identifier. |
| 134 | */ |
| 135 | public int getTypeFormatId() { |
| 136 | return StoredFormatIds.RAW_STORE_GLOBAL_XACT_ID_NEW; |
| 137 | } |
| 138 | |
| 139 | /************************************************************************** |
| 140 | * Private/Protected methods of This class: |
| 141 | ************************************************************************** |
| 142 | */ |
| 143 | |
| 144 | /************************************************************************** |
| 145 | * Public Methods of This class: |
| 146 | ************************************************************************** |
| 147 | */ |
| 148 | public int getFormat_Id() |
| 149 | { |
| 150 | return(format_id); |
| 151 | } |
| 152 | |
| 153 | public byte[] getGlobalTransactionId() |
| 154 | { |
| 155 | return(global_id); |
| 156 | } |
| 157 | |
| 158 | public byte[] getBranchQualifier() |
| 159 | { |
| 160 | return(branch_id); |
| 161 | } |
| 162 | } |