org.apache.activemq.artemis.reader.StreamMessageUtil Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.activemq.artemis.reader;
import org.apache.activemq.artemis.api.core.ActiveMQBuffer;
import org.apache.activemq.artemis.api.core.Pair;
import org.apache.activemq.artemis.utils.DataConstants;
public class StreamMessageUtil extends MessageUtil {
/**
* Method to read boolean values out of the Stream protocol existent on JMS Stream Messages
* Throws IllegalStateException if the type was invalid
*
* @param buff
* @return
*/
public static boolean streamReadBoolean(ActiveMQBuffer buff) {
byte type = buff.readByte();
switch (type) {
case DataConstants.BOOLEAN:
return buff.readBoolean();
case DataConstants.STRING:
String s = buff.readNullableString();
return Boolean.valueOf(s);
default:
throw new IllegalStateException("Invalid conversion, type byte was " + type);
}
}
public static byte streamReadByte(ActiveMQBuffer buff) {
int index = buff.readerIndex();
try {
byte type = buff.readByte();
switch (type) {
case DataConstants.BYTE:
return buff.readByte();
case DataConstants.STRING:
String s = buff.readNullableString();
return Byte.parseByte(s);
default:
throw new IllegalStateException("Invalid conversion");
}
} catch (NumberFormatException e) {
buff.readerIndex(index);
throw e;
}
}
public static short streamReadShort(ActiveMQBuffer buff) {
byte type = buff.readByte();
switch (type) {
case DataConstants.BYTE:
return buff.readByte();
case DataConstants.SHORT:
return buff.readShort();
case DataConstants.STRING:
String s = buff.readNullableString();
return Short.parseShort(s);
default:
throw new IllegalStateException("Invalid conversion");
}
}
public static char streamReadChar(ActiveMQBuffer buff) {
byte type = buff.readByte();
switch (type) {
case DataConstants.CHAR:
return (char) buff.readShort();
case DataConstants.STRING:
String str = buff.readNullableString();
if (str == null) {
throw new NullPointerException("Invalid conversion");
} else {
throw new IllegalStateException("Invalid conversion");
}
default:
throw new IllegalStateException("Invalid conversion");
}
}
public static int streamReadInteger(ActiveMQBuffer buff) {
byte type = buff.readByte();
switch (type) {
case DataConstants.BYTE:
return buff.readByte();
case DataConstants.SHORT:
return buff.readShort();
case DataConstants.INT:
return buff.readInt();
case DataConstants.STRING:
String s = buff.readNullableString();
return Integer.parseInt(s);
default:
throw new IllegalStateException("Invalid conversion");
}
}
public static long streamReadLong(ActiveMQBuffer buff) {
byte type = buff.readByte();
switch (type) {
case DataConstants.BYTE:
return buff.readByte();
case DataConstants.SHORT:
return buff.readShort();
case DataConstants.INT:
return buff.readInt();
case DataConstants.LONG:
return buff.readLong();
case DataConstants.STRING:
String s = buff.readNullableString();
return Long.parseLong(s);
default:
throw new IllegalStateException("Invalid conversion");
}
}
public static float streamReadFloat(ActiveMQBuffer buff) {
byte type = buff.readByte();
switch (type) {
case DataConstants.FLOAT:
return Float.intBitsToFloat(buff.readInt());
case DataConstants.STRING:
String s = buff.readNullableString();
return Float.parseFloat(s);
default:
throw new IllegalStateException("Invalid conversion");
}
}
public static double streamReadDouble(ActiveMQBuffer buff) {
byte type = buff.readByte();
switch (type) {
case DataConstants.FLOAT:
return Float.intBitsToFloat(buff.readInt());
case DataConstants.DOUBLE:
return Double.longBitsToDouble(buff.readLong());
case DataConstants.STRING:
String s = buff.readNullableString();
return Double.parseDouble(s);
default:
throw new IllegalStateException("Invalid conversion: " + type);
}
}
public static String streamReadString(ActiveMQBuffer buff) {
byte type = buff.readByte();
switch (type) {
case DataConstants.BOOLEAN:
return String.valueOf(buff.readBoolean());
case DataConstants.BYTE:
return String.valueOf(buff.readByte());
case DataConstants.SHORT:
return String.valueOf(buff.readShort());
case DataConstants.CHAR:
return String.valueOf((char) buff.readShort());
case DataConstants.INT:
return String.valueOf(buff.readInt());
case DataConstants.LONG:
return String.valueOf(buff.readLong());
case DataConstants.FLOAT:
return String.valueOf(Float.intBitsToFloat(buff.readInt()));
case DataConstants.DOUBLE:
return String.valueOf(Double.longBitsToDouble(buff.readLong()));
case DataConstants.STRING:
return buff.readNullableString();
default:
throw new IllegalStateException("Invalid conversion");
}
}
/**
* Utility for reading bytes out of streaming.
* It will return remainingBytes, bytesRead
*
* @param remainingBytes remaining Bytes from previous read. Send it to 0 if it was the first call for the message
* @param buff
* @return a pair of remaining bytes and bytes read
*/
public static Pair streamReadBytes(ActiveMQBuffer buff, int remainingBytes, byte[] value) {
if (remainingBytes == -1) {
return new Pair<>(0, -1);
} else if (remainingBytes == 0) {
byte type = buff.readByte();
if (type != DataConstants.BYTES) {
throw new IllegalStateException("Invalid conversion");
}
remainingBytes = buff.readInt();
}
int read = Math.min(value.length, remainingBytes);
buff.readBytes(value, 0, read);
remainingBytes -= read;
if (remainingBytes == 0) {
remainingBytes = -1;
}
return new Pair<>(remainingBytes, read);
}
public static Object streamReadObject(ActiveMQBuffer buff) {
byte type = buff.readByte();
switch (type) {
case DataConstants.BOOLEAN:
return buff.readBoolean();
case DataConstants.BYTE:
return buff.readByte();
case DataConstants.SHORT:
return buff.readShort();
case DataConstants.CHAR:
return (char) buff.readShort();
case DataConstants.INT:
return buff.readInt();
case DataConstants.LONG:
return buff.readLong();
case DataConstants.FLOAT:
return Float.intBitsToFloat(buff.readInt());
case DataConstants.DOUBLE:
return Double.longBitsToDouble(buff.readLong());
case DataConstants.STRING:
return buff.readNullableString();
case DataConstants.BYTES:
int bufferLen = buff.readInt();
byte[] bytes = new byte[bufferLen];
buff.readBytes(bytes);
return bytes;
default:
throw new IllegalStateException("Invalid conversion");
}
}
}