io.vertx.ext.web.sstore.impl.SharedDataSessionImpl Maven / Gradle / Ivy
/*
* Copyright 2014 Red Hat, Inc.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Apache License v2.0 which accompanies this distribution.
*
* The Eclipse Public License is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* The Apache License v2.0 is available at
* http://www.opensource.org/licenses/apache2.0.php
*
* You may elect to redistribute this code under either of these licenses.
*/
package io.vertx.ext.web.sstore.impl;
import io.vertx.core.VertxException;
import io.vertx.core.buffer.Buffer;
import io.vertx.core.shareddata.Shareable;
import io.vertx.core.shareddata.ClusterSerializable;
import io.vertx.ext.auth.VertxContextPRNG;
import io.vertx.ext.web.impl.Utils;
import io.vertx.ext.web.sstore.AbstractSession;
import java.lang.reflect.InvocationTargetException;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* @author Tim Fox
*/
public class SharedDataSessionImpl extends AbstractSession implements ClusterSerializable, Shareable {
private static final Charset UTF8 = StandardCharsets.UTF_8;
private static final byte TYPE_LONG = 1;
private static final byte TYPE_INT = 2;
private static final byte TYPE_SHORT = 3;
private static final byte TYPE_BYTE = 4;
private static final byte TYPE_DOUBLE = 5;
private static final byte TYPE_FLOAT = 6;
private static final byte TYPE_CHAR = 7;
private static final byte TYPE_BOOLEAN = 8;
private static final byte TYPE_STRING = 9;
private static final byte TYPE_BUFFER = 10;
private static final byte TYPE_BYTES = 11;
private static final byte TYPE_CLUSTER_SERIALIZABLE = 13;
/**
* Important note: This constructor (even though not referenced anywhere) is required for serialization purposes. Do
* not remove.
*/
public SharedDataSessionImpl() {
super();
}
public SharedDataSessionImpl(VertxContextPRNG random) {
super(random);
}
public SharedDataSessionImpl(VertxContextPRNG random, long timeout, int length) {
super(random, timeout, length);
}
@Override
public void writeToBuffer(Buffer buff) {
byte[] bytes = id().getBytes(UTF8);
buff.appendInt(bytes.length).appendBytes(bytes);
buff.appendLong(timeout());
buff.appendLong(lastAccessed());
buff.appendInt(version());
// use cache
Buffer dataBuf = writeDataToBuffer();
buff.appendBuffer(dataBuf);
}
@Override
public int readFromBuffer(int pos, Buffer buffer) {
int len = buffer.getInt(pos);
pos += 4;
byte[] bytes = buffer.getBytes(pos, pos + len);
pos += len;
setId(new String(bytes, UTF8));
setTimeout(buffer.getLong(pos));
pos += 8;
setLastAccessed(buffer.getLong(pos));
pos += 8;
setVersion(buffer.getInt(pos));
pos += 4;
pos = readDataFromBuffer(pos, buffer);
return pos;
}
private Buffer writeDataToBuffer() {
Buffer buffer = Buffer.buffer();
if (isEmpty()) {
buffer.appendInt(0);
} else {
final Map data = data();
buffer.appendInt(data.size());
for (Map.Entry entry : data.entrySet()) {
String key = entry.getKey();
byte[] keyBytes = key.getBytes(UTF8);
buffer.appendInt(keyBytes.length).appendBytes(keyBytes);
Object val = entry.getValue();
if (val instanceof Long) {
buffer.appendByte(TYPE_LONG).appendLong((long) val);
} else if (val instanceof Integer) {
buffer.appendByte(TYPE_INT).appendInt((int) val);
} else if (val instanceof Short) {
buffer.appendByte(TYPE_SHORT).appendShort((short) val);
} else if (val instanceof Byte) {
buffer.appendByte(TYPE_BYTE).appendByte((byte) val);
} else if (val instanceof Double) {
buffer.appendByte(TYPE_DOUBLE).appendDouble((double) val);
} else if (val instanceof Float) {
buffer.appendByte(TYPE_FLOAT).appendFloat((float) val);
} else if (val instanceof Character) {
buffer.appendByte(TYPE_CHAR).appendShort((short) ((Character) val).charValue());
} else if (val instanceof Boolean) {
buffer.appendByte(TYPE_BOOLEAN).appendByte((byte) ((boolean) val ? 1 : 0));
} else if (val instanceof String) {
byte[] bytes = ((String) val).getBytes(UTF8);
buffer.appendByte(TYPE_STRING).appendInt(bytes.length).appendBytes(bytes);
} else if (val instanceof Buffer) {
Buffer buff = (Buffer) val;
buffer.appendByte(TYPE_BUFFER).appendInt(buff.length()).appendBuffer(buff);
} else if (val instanceof byte[]) {
byte[] bytes = (byte[]) val;
buffer.appendByte(TYPE_BYTES).appendInt(bytes.length).appendBytes(bytes);
} else if (val instanceof ClusterSerializable) {
buffer.appendByte(TYPE_CLUSTER_SERIALIZABLE);
String className = val.getClass().getName();
byte[] classNameBytes = className.getBytes(UTF8);
buffer.appendInt(classNameBytes.length).appendBytes(classNameBytes);
((ClusterSerializable) val).writeToBuffer(buffer);
} else {
if (val != null) {
throw new IllegalStateException("Invalid type for data in session: " + val.getClass());
}
}
}
}
return buffer;
}
private int readDataFromBuffer(int pos, Buffer buffer) {
try {
int entries = buffer.getInt(pos);
pos += 4;
if (entries > 0) {
final Map data = new ConcurrentHashMap<>(entries);
for (int i = 0; i < entries; i++) {
int keylen = buffer.getInt(pos);
pos += 4;
byte[] keyBytes = buffer.getBytes(pos, pos + keylen);
pos += keylen;
String key = new String(keyBytes, UTF8);
byte type = buffer.getByte(pos++);
Object val;
switch (type) {
case TYPE_LONG:
val = buffer.getLong(pos);
pos += 8;
break;
case TYPE_INT:
val = buffer.getInt(pos);
pos += 4;
break;
case TYPE_SHORT:
val = buffer.getShort(pos);
pos += 2;
break;
case TYPE_BYTE:
val = buffer.getByte(pos);
pos++;
break;
case TYPE_FLOAT:
val = buffer.getFloat(pos);
pos += 4;
break;
case TYPE_DOUBLE:
val = buffer.getDouble(pos);
pos += 8;
break;
case TYPE_CHAR:
short s = buffer.getShort(pos);
pos += 2;
val = (char) s;
break;
case TYPE_BOOLEAN:
byte b = buffer.getByte(pos);
pos++;
val = b == 1;
break;
case TYPE_STRING:
int len = buffer.getInt(pos);
pos += 4;
byte[] bytes = buffer.getBytes(pos, pos + len);
val = new String(bytes, UTF8);
pos += len;
break;
case TYPE_BUFFER:
len = buffer.getInt(pos);
pos += 4;
bytes = buffer.getBytes(pos, pos + len);
val = Buffer.buffer(bytes);
pos += len;
break;
case TYPE_BYTES:
len = buffer.getInt(pos);
pos += 4;
val = buffer.getBytes(pos, pos + len);
pos += len;
break;
case TYPE_CLUSTER_SERIALIZABLE:
int classNameLen = buffer.getInt(pos);
pos += 4;
byte[] classNameBytes = buffer.getBytes(pos, pos + classNameLen);
pos += classNameLen;
String className = new String(classNameBytes, UTF8);
Class clazz = Utils.getClassLoader().loadClass(className);
if (!ClusterSerializable.class.isAssignableFrom(clazz)) {
throw new ClassCastException(new String(classNameBytes, StandardCharsets.UTF_8) + " is not assignable from ClusterSerializable");
}
ClusterSerializable obj = (ClusterSerializable) clazz.getDeclaredConstructor().newInstance();
pos = obj.readFromBuffer(pos, buffer);
val = obj;
break;
default:
throw new IllegalStateException("Invalid serialized type: " + type);
}
data.put(key, val);
}
setData(data);
}
return pos;
} catch (ClassNotFoundException | NoSuchMethodException | IllegalAccessException | InvocationTargetException | InstantiationException e) {
throw new VertxException(e);
}
}
}