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82 lines
3.2 KiB
Java
82 lines
3.2 KiB
Java
// Copyright 2016 The Nomulus Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package google.registry.model.eppcommon;
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import com.google.common.annotations.VisibleForTesting;
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import com.google.common.io.BaseEncoding;
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import com.googlecode.objectify.annotation.Embed;
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import google.registry.model.ImmutableObject;
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import java.nio.ByteBuffer;
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import java.util.UUID;
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import java.util.concurrent.atomic.AtomicLong;
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import javax.xml.bind.annotation.XmlElement;
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import javax.xml.bind.annotation.XmlType;
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/**
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* "A {@code TRID} (transaction identifier) element containing the transaction identifier assigned
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* by the server to the command for which the response is being returned. The transaction identifier
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* is formed using the {@code clTRID} associated with the command if supplied by the client and a
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* {@code svTRID} (server transaction identifier) that is assigned by and unique to the server."
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*/
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@Embed
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@XmlType(propOrder = {"clientTransactionId", "serverTransactionId"})
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public class Trid extends ImmutableObject {
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private static final String SERVER_ID = getServerId();
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private static final AtomicLong COUNTER = new AtomicLong();
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/** Creates a unique id for this server instance, as a base64 encoded UUID. */
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private static String getServerId() {
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UUID uuid = UUID.randomUUID();
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ByteBuffer buffer = ByteBuffer.allocate(16);
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buffer.asLongBuffer()
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.put(0, uuid.getMostSignificantBits())
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.put(1, uuid.getLeastSignificantBits());
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return BaseEncoding.base64().encode(buffer.array());
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}
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/** The server transaction id. */
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@XmlElement(name = "svTRID", namespace = "urn:ietf:params:xml:ns:epp-1.0")
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String serverTransactionId;
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/** The client transaction id, if provided by the client, otherwise null. */
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@XmlElement(name = "clTRID", namespace = "urn:ietf:params:xml:ns:epp-1.0")
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String clientTransactionId;
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public String getServerTransactionId() {
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return serverTransactionId;
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}
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public String getClientTransactionId() {
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return clientTransactionId;
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}
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public static Trid create(String clientTransactionId) {
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Trid instance = new Trid();
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instance.clientTransactionId = clientTransactionId;
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// The server id can be at most 64 characters. The SERVER_ID is at most 22 characters (128 bits
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// in base64), plus the dash. That leaves 41 characters, so we just append the counter in hex.
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instance.serverTransactionId = String.format("%s-%x", SERVER_ID, COUNTER.incrementAndGet());
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return instance;
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}
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@VisibleForTesting
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public static Trid create(String clientTransactionId, String serverTransactionId) {
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Trid instance = new Trid();
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instance.clientTransactionId = clientTransactionId;
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instance.serverTransactionId = serverTransactionId;
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return instance;
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}
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}
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