1. SOA WITH C, C++, PHP …
Supun Kamburugamuva
supun@wso2.com

2. SOA Workshop
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Language of your choice
 You must have Freedom to choose
 You must have Reasons to choose

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Why C?
 Most portable
 Less memory
 Faster
 Many interesting applications written in C
 HTTPD
 Ruby
 MySQL
 PHP

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Why C++?
 Widely used (and some legacy)
 Financial, Banking, Telco, DBMS, Embedded
 Performance, Flexibility, Control

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Why PHP?
 Installed on over 20 million websites
 1 million web servers
 Easiest way to write services and clients

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SOA in a Heterogeneous World

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Expectations
 Tooling for WSDL
 Security
 Interoperability
 Binary attachments
 Reliability
 Support

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PHP Web Services Frameworks
Package Written in WSDL Security Attachments Reliability
PHP5 SOAP Ext C Partial No No No
NuSOAP PHP Yes No No No
SCA with PHP(IBM) PHP Yes No No No
WSO2 WSF/PHP C Yes Yes Ye s Ye s

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 Framework that improves PHP user’s ability to
provide and consume Web services
 Capable of dealing with secure and reliable
messaging even with binary data, the only PHP
software package to offer those features
 The framework is inter-operable with non-PHP
implementations, allowing it to be integrated with
enterprise applications seamlessly

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PHP Example – Secure Service
1. function echoFunction($inMessage) {
2. $returnMessage = new WSMessage($inMessage->str);
3. return $returnMessage;
4. }
1. $pub_key = ws_get_cert_from_file("../keys/alice_cert.cert");
2. $pvt_key = ws_get_key_from_file("../keys/bob_key.pem");
1. $operations = array("echoString" => "echoFunction");
1. $sec_array = array("encrypt" => TRUE, "algorithmSuite" => "Basic256Rsa15",
2. "securityTokenReference" => "IssuerSerial");
1. $actions = array("http://php.axis2.org/samples/echoString" => "echoString");
1. $policy = new WSPolicy(array("security"=>$sec_array));
2. $sec_token = new WSSecurityToken(array("privateKey" => $pvt_key,
3. "receiverCertificate" =>$pub_key));
1. $service = new WSService(array("actions" => $actions,
2. "operations" => $operations,
3. "policy" => $policy, "securityToken" => $sec_token));
1. $service->reply();

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PHP Example – Secure Client
1. $rec_cert = ws_get_cert_from_file("../keys/bob_cert.cert");
2. $pvt_key = ws_get_key_from_file("../keys/alice_key.pem");
1. $reqMessage = new WSMessage($reqPayloadString, array("to"=>
2. "http://localhost/samples/security/encryption/encrypt_service.php",
3. "action" => "http://php.axis2.org/samples/echoString"));
1. $sec_array = array("encrypt"=>TRUE, "algorithmSuite" => "Basic256Rsa15",
2. "securityTokenReference" => "IssuerSerial");
1. $policy = new WSPolicy(array("security"=>$sec_array));
2. $sec_token = new WSSecurityToken(array("privateKey" => $pvt_key,
3. "receiverCertificate" => $rec_cert));
1. $client = new WSClient(array("useWSA" => TRUE, "policy" => $policy,
2. "securityToken" => $sec_token));
1. $resMessage = $client->request($reqMessage);
1. printf("Response = %s n", $resMessage->str);

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How to adapt a C++ Application as Santa Clara
Web Services

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C/C++ Web Services Frameworks
Package WSDL Security Attachments Reliability
HydraExpress Partial No Partial No
gSOAP Yes Partial Yes No
WSO2 WSF/C Partial Ye s Yes Yes
WSO2 WSF/C++ Partial Ye s Yes Yes

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 Designed for embedding within C or C++ software
stacks to enable Web services
 All-in-one solution for the building and deploying of
Web services
 Widest range of WS-* specifications
implementations
 WS-Addressing, WS-Policy, WS-Security, WS-
SecurityPolicy, WS-Reliable Messaging, MTOM and
WS-eventing

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C++ Example - Service
1. #include <ServiceSkeleton.h>
1. using namespace wso2wsf;
1. class Echo: public ServiceSkeleton
2. {
3. public:
4. WSF_EXTERN WSF_CALL Echo(){};
1. OMElement* WSF_CALL invoke(OMElement *message, MessageContext *msgCtx);
1. OMElement* WSF_CALL onFault(OMElement *message);
1. void WSF_CALL init(){};
2. };
1. OMElement* Echo::invoke(OMElement *element, MessageContext *msgCtx)
2. {
3. OMElement *echoElement = new OMElement(element->getLocalname(),
4. new OMNamespace(element->getNamespace(false)->getURI(),
5. element->getNamespace(false)->getPrefix()));
6. OMElement *textElement = new OMElement("messsage");
7. echoElement->addChild(textElement);
8. textElement->setText("Hello World");
9. return echoElement;
10. }

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C++ Example - Client
1. ServiceClient serviceClient(client_repo, end_point);
1. OMNamespace * ns = new OMNamespace("http://ws.apache.org/rampart/c/samples", "ns1");
2. OMElement * payload = new OMElement(NULL, "echoIn", ns);
3. OMElement * child = new OMElement(payload, "message", NULL);
4. child->setText("Hello Service!");
1. try
2. {
3. OMElement* response = serviceClient.request(payload,
4. "http://example.com/ws/2004/09/policy/Test/EchoRequest");
5. if (response)
6. {
7. cout << endl << "Response: " << response << endl;
8. }
9. }
10. catch (AxisFault & e)
11. {
12. if (serviceClient.getLastSOAPFault())
13. {
14. cout << endl << "Fault: " << serviceClient.getLastSOAPFault() << endl;
15. }
16. else
17. {
18. cout << endl << "Error: " << e << endl;
19. }
20. }
21. delete payload;

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Web Services are Fast

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Web Services are Faster

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Web Services are Still Faster
 For secure services
 10K messages C implementation x10 – x15 times
faster than Java
 100k messages C implementation x6 – x8 times faster
than Java

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WSF/C++ Features
 SOAP 1.1 and SOAP 1.2
 WS-Addressing
 1.0
 Submission
 MTOM and SwA
 Support for caching large attachments
 WS-Security
 Base security standards mean that messages can be protected using
Encryption, Authentication and Signature
 Including WS-SecureConversation and WS-Trust
 WSDL2CPP Code Generation tool
 Supports generating client stubs, service skeletons, build scripts and
deployment scripts

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WSF/C++ Features
 WS-Policy and WS-Security Policy
 Enables using industry standard XML to confgure security
 SSL Enabled Transport Layer
 Reliable Messaging 1.0, 1.1 and WS-RMPolicy
 Enables reliability between platforms including message resending, duplicate detection and
persistence
 Full REST support (GET, PUT, DELETE, POST)
with custom URI Mapping
 Enables mapping a REST API easily and naturally
 Useful tools
 Tcpmon
 wsclient

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References
 Various Web Services Frameworks
http://wso2.org/projects/wsf
 Apache Axis2/C Web Services Performance
http://wso2.org/library/3532
 Example applications for SOA
http://incubator.apache.org/stonehenge/
 PHP Web Services Blog
http://phpwebservices.blogspot.com/

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Thank You!
 Q&A