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A LWM2M client and server based on Californium (CoAP) all in one.
/*******************************************************************************
* Copyright (c) 2013-2015 Sierra Wireless and others.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Eclipse Distribution License v1.0 which accompany this distribution.
*
* The Eclipse Public License is available at
* http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.html.
*
* Contributors:
* Sierra Wireless - initial API and implementation
*******************************************************************************/
package org.eclipse.leshan.server.client;
import java.io.Serializable;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.leshan.LinkObject;
import org.eclipse.leshan.core.request.BindingMode;
import org.eclipse.leshan.util.Validate;
/**
* An immutable structure which represent a LW-M2M client registered on the server
*/
public class Client implements Serializable {
private static final long serialVersionUID = 1L;
private static final long DEFAULT_LIFETIME_IN_SEC = 86400L;
private static final String DEFAULT_LWM2M_VERSION = "1.0";
private final Date registrationDate;
private final InetAddress address;
private final int port;
/*
* The address of the LWM2M Server's CoAP end point the client used to register.
*/
private final InetSocketAddress registrationEndpointAddress;
private final long lifeTimeInSec;
private final String smsNumber;
private final String lwM2mVersion;
private final BindingMode bindingMode;
/**
* The LWM2M Client's unique end point name.
*/
private final String endpoint;
private final String registrationId;
private final LinkObject[] objectLinks;
private final Map additionalRegistrationAttributes;
/** The location where LWM2M objects are hosted on the device */
private final String rootPath;
private final Date lastUpdate;
protected Client(String registrationId, String endpoint, InetAddress address, int port, String lwM2mVersion,
Long lifetimeInSec, String smsNumber, BindingMode bindingMode, LinkObject[] objectLinks,
InetSocketAddress registrationEndpointAddress,
Date registrationDate, Date lastUpdate, Map additionalRegistrationAttributes) {
Validate.notNull(registrationId);
Validate.notEmpty(endpoint);
Validate.notNull(address);
Validate.notNull(port);
Validate.notNull(registrationEndpointAddress);
this.registrationId = registrationId;
this.endpoint = endpoint;
this.address = address;
this.port = port;
this.smsNumber = smsNumber;
this.registrationEndpointAddress = registrationEndpointAddress;
this.objectLinks = objectLinks;
// extract the root objects path from the object links
String rootPath = "/";
if (objectLinks != null) {
for (LinkObject link : objectLinks) {
if (link != null && "oma.lwm2m".equals(link.getAttributes().get("rt"))) {
rootPath = link.getUrl();
break;
}
}
}
this.rootPath = rootPath;
this.lifeTimeInSec = lifetimeInSec == null ? DEFAULT_LIFETIME_IN_SEC : lifetimeInSec;
this.lwM2mVersion = lwM2mVersion == null ? DEFAULT_LWM2M_VERSION : lwM2mVersion;
this.bindingMode = bindingMode == null ? BindingMode.U : bindingMode;
this.registrationDate = registrationDate == null ? new Date() : registrationDate;
this.lastUpdate = lastUpdate == null ? new Date() : lastUpdate;
this.additionalRegistrationAttributes = additionalRegistrationAttributes == null
? Collections.unmodifiableMap(new HashMap())
: Collections.unmodifiableMap(additionalRegistrationAttributes);
}
public String getRegistrationId() {
return registrationId;
}
public Date getRegistrationDate() {
return registrationDate;
}
/**
* Gets the client's network address.
*
* @return the source address from the client's most recent CoAP message.
*/
public InetAddress getAddress() {
return address;
}
/**
* Gets the client's network port number.
*
* @return the source port from the client's most recent CoAP message.
*/
public int getPort() {
return port;
}
/**
* Gets the network address and port number of LWM2M Server's CoAP endpoint the client originally registered at.
*
* A LWM2M Server may listen on multiple CoAP end points, e.g. a non-secure and a secure one. Clients are often
* behind a firewall which will only let incoming UDP packets pass if they originate from the same address:port that
* the client has initiated communication with, e.g. by means of registering with the LWM2M Server. It is therefore
* important to know, which of the server's CoAP end points the client contacted for registration.
*
* This information can be used to uniquely identify the CoAP endpoint that should be used to access resources on
* the client.
*
* @return the network address and port number
*/
public InetSocketAddress getRegistrationEndpointAddress() {
return registrationEndpointAddress;
}
public LinkObject[] getObjectLinks() {
return objectLinks;
}
public LinkObject[] getSortedObjectLinks() {
// sort the list of objects
if (objectLinks == null) {
return null;
}
LinkObject[] res = Arrays.copyOf(objectLinks, objectLinks.length);
Arrays.sort(res, new Comparator() {
/* sort by path */
@Override
public int compare(LinkObject o1, LinkObject o2) {
if (o1 == null && o2 == null)
return 0;
if (o1 == null)
return -1;
if (o2 == null)
return 1;
// by URL
String[] url1 = o1.getUrl().split("/");
String[] url2 = o2.getUrl().split("/");
for (int i = 0; i < url1.length && i < url2.length; i++) {
// is it two numbers?
if (isNumber(url1[i]) && isNumber(url2[i])) {
int cmp = Integer.parseInt(url1[i]) - Integer.parseInt(url2[i]);
if (cmp != 0) {
return cmp;
}
} else {
int v = url1[i].compareTo(url2[i]);
if (v != 0) {
return v;
}
}
}
return url1.length - url2.length;
}
});
return res;
}
private static boolean isNumber(String s) {
try {
Integer.parseInt(s);
return true;
} catch (NumberFormatException e) {
return false;
}
}
public synchronized Long getLifeTimeInSec() {
return lifeTimeInSec;
}
public String getSmsNumber() {
return smsNumber;
}
public String getLwM2mVersion() {
return lwM2mVersion;
}
public BindingMode getBindingMode() {
return bindingMode;
}
/**
* @return the path where the objects are hosted on the device
*/
public String getRootPath() {
return rootPath;
}
/**
* Gets the unique name the client has registered with.
*
* @return the name
*/
public String getEndpoint() {
return endpoint;
}
public Date getLastUpdate() {
return lastUpdate;
}
public boolean isAlive() {
return lastUpdate.getTime() + lifeTimeInSec * 1000 > System.currentTimeMillis();
}
public Map getAdditionalRegistrationAttributes() {
return additionalRegistrationAttributes;
}
public boolean usesQueueMode() {
return bindingMode.equals(BindingMode.UQ);
}
@Override
public String toString() {
return String.format(
"Client [registrationDate=%s, address=%s, port=%s, registrationEndpoint=%s, lifeTimeInSec=%s, smsNumber=%s, lwM2mVersion=%s, bindingMode=%s, endpoint=%s, registrationId=%s, objectLinks=%s, lastUpdate=%s]",
registrationDate, address, port, registrationEndpointAddress, lifeTimeInSec, smsNumber, lwM2mVersion,
bindingMode, endpoint, registrationId, Arrays.toString(objectLinks), lastUpdate);
}
/**
* Computes a hash code for this client.
*
* @return the hash code based on the endpoint property
*/
@Override
public int hashCode() {
return getEndpoint().hashCode();
}
/**
* Compares this Client to another object.
*
* @return true if the other object is a Client instance and its endpoint property has the
* same value as this Client
*/
@Override
public boolean equals(Object obj) {
if (obj instanceof Client) {
Client other = (Client) obj;
return this.getEndpoint().equals(other.getEndpoint());
} else {
return false;
}
}
public static class Builder {
private final String registrationId;
private final String endpoint;
private final InetAddress address;
private final int port;
private final InetSocketAddress registrationEndpointAddress;
private Date registrationDate;
private Date lastUpdate;
private Long lifeTimeInSec;
private String smsNumber;
private BindingMode bindingMode;
private String lwM2mVersion;
private LinkObject[] objectLinks;
private Map additionalRegistrationAttributes;
public Builder(String registrationId, String endpoint, InetAddress address, int port,
InetSocketAddress registrationEndpointAddress) {
Validate.notNull(registrationId);
Validate.notEmpty(endpoint);
Validate.notNull(address);
Validate.notNull(port);
Validate.notNull(registrationEndpointAddress);
this.registrationId = registrationId;
this.endpoint = endpoint;
this.address = address;
this.port = port;
this.registrationEndpointAddress = registrationEndpointAddress;
}
public Builder registrationDate(Date registrationDate) {
this.registrationDate = registrationDate;
return this;
}
public Builder lastUpdate(Date lastUpdate) {
this.lastUpdate = lastUpdate;
return this;
}
public Builder lifeTimeInSec(Long lifetimeInSec) {
this.lifeTimeInSec = lifetimeInSec;
return this;
}
public Builder smsNumber(String smsNumber) {
this.smsNumber = smsNumber;
return this;
}
public Builder bindingMode(BindingMode bindingMode) {
this.bindingMode = bindingMode;
return this;
}
public Builder lwM2mVersion(String lwM2mVersion) {
this.lwM2mVersion = lwM2mVersion;
return this;
}
public Builder objectLinks(LinkObject[] objectLinks) {
this.objectLinks = objectLinks;
return this;
}
public Builder additionalRegistrationAttributes(Map additionalRegistrationAttributes) {
this.additionalRegistrationAttributes = additionalRegistrationAttributes;
return this;
}
public Client build() {
return new Client(Builder.this.registrationId, Builder.this.endpoint, Builder.this.address,
Builder.this.port, Builder.this.lwM2mVersion, Builder.this.lifeTimeInSec, Builder.this.smsNumber,
this.bindingMode, this.objectLinks, this.registrationEndpointAddress, this.registrationDate,
this.lastUpdate, this.additionalRegistrationAttributes);
}
}
}