CBvoid
CBdouble(Seq)
CBfloat(Seq)
CBstring(Seq)
CBlong(Seq)
CBuLong(Seq)
CBboolean(Seq)
CBlongLong
CBuLongLong

Presentation

Scope
- Simple oneway calls
- Offshoot/Callback Architecture
Duration: 10 minutes

Hands-On Exercise

Component IDL

Code Block

language	cpp
title	Async.idl
linenumbers	true
collapse	true

#ifndef _ASYNC_IDL_
#define _ASYNC_IDL_

#pragma prefix "alma"

#include <acscommon.idl>
#include <acscomponent.idl>

module workshop
{
    interface Async : ACS::ACSComponent {
        oneway void delayResult(in ACS::uLong delay, in ACS::CBuLong cb, in ACS::CBDescIn desc);
    };
};
#endif

...

Code Block

language	cpp
title	AsyncImpl.h
linenumbers	true
collapse	true

#ifndef _ASYNC_IMPL_H
#define _ASYNC_IMPL_H

#include <acscomponentImpl.h>
#include <AsyncS.h>

class AsyncImpl : public virtual acscomponent::ACSComponentImpl, public virtual POA_workshop::Async
{
  public:
    AsyncImpl(const ACE_CString& name, maci::ContainerServices* containerServices);
    virtual ~AsyncImpl();
    void delayResult(ACS::uLong delay, ACS::CBuLong_ptr cb, const ACS::CBDescIn& desc);
};
#endif

Code Block

language	cpp
title	AsyncImpl.cpp
linenumbers	true
collapse	true

#include <AsyncImpl.h>
#include <ACSErrTypeOK.h>

AsyncImpl::AsyncImpl(const ACE_CString& name, maci::ContainerServices* containerServices) : acscomponent::ACSComponentImpl(name, containerServices) {
}

AsyncImpl::~AsyncImpl() {
}

void AsyncImpl::delayResult(ACS::uLong delay, ACS::CBuLong_ptr cb, const ACS::CBDescIn& desc) {
    ACSErr::Completion completion;
    ACS::CBDescOut descOut;

    completion = ACSErrTypeOK::ACSErrOKCompletion();
    cb->working(0, completion, descOut);
    sleep(delay);
    cb->done(delay, completion, descOut);
}

/* --------------- [ MACI DLL support functions ] -----------------*/
#include <maciACSComponentDefines.h>
MACI_DLL_SUPPORT_FUNCTIONS(AsyncImpl)
/* ----------------------------------------------------------------*/

...

Code Block

title	Components.xml
linenumbers	true
collapse	true

<e Name="ASYNC"
   Code="asyncImplAsyncImpl"
   Type="IDL:alma/workshop/Async:1.0"
   Container="bilboContainer"
   ImplLang="cpp"
   KeepAliveTime="0"
/>

...

Code Block

language	py
title	AsyncClient.py
linenumbers	true
collapse	true

import ACS
import time

from Acspy.Common.Callbacks import CBuLongCBuLongLong
from Acspy.Clients.SimpleClient import PySimpleClient

client = PySimpleClient()
comp = client.getComponent('ASYNC')

cb = CBuLongCBuLongLong()
cbObj = client.activateOffShoot(cb)
desc = ACS.CBDescIn(0, 0, 0)

print(cb.status)
comp.delayResult(8, cbObj, desc)

print(cb.status)
time.sleep(5)
print(cb.status)
time.sleep(5)
print(cb.status)

print(cb.values)

client.releaseComponent(comp.name)
client.disconnect()

...

Code Block

language	java
title	AsyncClient.java
linenumbers	true
collapse	true

package workshop...async;
 
import java.util.logging.Logger;
 
import alma.acs.component.client.ComponentClient;
 
import alma.ACS.CBDescIn;
import alma.ACS.CBDescOut;
import alma.ACSErr.Completion;
 
import alma.workshop.Async;
import alma.workshop.AsyncHelper;
 
import alma.ACS.CBuLong;
import alma.ACS.CBuLongPOA;
 
public class AsyncClient extends ComponentClient {
    class CBuLongImpl extends CBuLongPOA
    {
        public unsignedint long value;
        public String status;
        public MyTestCBvoidCBuLongImpl(Logger logger) {
            status = "INIT";
            this.value = 0;
        }
        public void working(unsignedint long value, Completion completion, CBDescOut desc) {
            status = "WORKING";
            this.value = value;
        }
        public void done(unsigned longint value, Completion completion, CBDescOut desc) {
            status = "DONE";
            this.value = value;
        }
        public boolean negotiate(long timeToTransit, CBDescOut desc) {
            return true;
        }
    }
 
    private Logger m_logger;
 
    public AsyncClient() throws Exception {
        String managerLoc =super(null, System.getProperty("ACS.manager");
        super(null, managerLoc, clientName, "AsyncClient");
        m_logger = getContainerServices().getLogger();
    }
 
    public void doStuff() {
        try {
            org.omg.CORBA.Object obj = getContainerServices().getComponent("ASYNC");
 
            Async comp = AsyncHelper.narrow(obj);
            CBuLongImpl cb = new CBuLongImpl(m_logger);
            CBuLong cbObj = alma.ACS.CBuLongHelper.narrow(getContainerServices().activateOffShoot(cb));
        CBDescIn    CBDescIn desc = new CBDescIn();
 
            m_logger.info(String.valueOf(cb.status));
            comp.delayResult(8, cbObj, desc);
 
            m_logger.info(String.valueOf(cb.status));
            Thread.sleep(5000);
            m_logger.info(String.valueOf(cb.status));
            Thread.sleep(5000);
 
            m_logger.info(String.valueOf(cb.status));
        m    m_logger.info(String.valueOf(cb.value));
 

            getContainerServices().releaseComponent("ASYNC");
    }

    public static} void main(String[] argscatch(Exception e) {
        AsyncClient client = new AsyncCliente.printStackTrace();
        client.doStuff();}
    }
}

C++


 
    public static void main(String[] args) {
        try {
            AsyncClient client = new AsyncClient();
            client.doStuff();
        } catch(Exception e) {
            e.printStackTrace();
        }
    }
}

C++

Code Block

language	cpp
title	AsyncClient.cpp
linenumbers	true
collapse	true

#include <maciSimpleClient.h>
#include <AsyncC.h>
#include <ACSErrTypeCommon.h>
#include <acsutilTimeStamp.h>
 
using namespace maci;
class CBuLongImpl : public virtual POA_ACS::CBuLong {
  public:
    CBuLongImpl() {value = 0; status=std::string("INIT");}
    virtual ~CBuLongImpl() {}
    void working (ACS::uLong value, const ACSErr::Completion &c, const ACS::CBDescOut &desc) {
        status = std::string("WORKING");
        this->value = value;
    }
    void done (ACS::uLong value, const ACSErr::Completion &c, const ACS::CBDescOut &desc){
        status = std::string("DONE");
        this->value = value;
    }
    CORBA::Boolean negotiate (ACS::TimeInterval time_to_transmit, const ACS::CBDescOut &desc) {
            return true;
    }
  public:
    ACS::uLong value;
    std::string status;
};
 
int main(int argc, char *argv[]) {
    SimpleClient client;
    workshop::Async_var comp;
 
    if (client.init(argc,argv) == 0) {
        return -1;
    } else {
        client.login();
    }
 
    try {
        comp = client.getComponent<workshop::Async>("ASYNC", 0, true)("ASYNC", 0, true);
    } catch(maciErrType::CannotGetComponentExImpl& _ex) {
        _ex.log();
        return -1;
    } catch(maciErrType::CannotGetComponentExImpl& _ex) {
 
    CBuLongImpl cb{};
    ACS::CBuLong_var cbObj =  _ex.logcb._this();
    ACS::CBDescIn desc;
    desc.id_tag return= -12;
    }
 
    CBuLongImpl cb{}ACS_SHORT_LOG((LM_INFO, "%s", cb.status));
    ACS::CBuLong_var cbObj = cb._this();comp->delayResult(8, cbObj.in(), desc);
 
    ACS::CBDescIn desc_SHORT_LOG((LM_INFO, "%s", cb.status));
    desc.id_tag = 2sleep(5);
 
    ACS_SHORT_LOG((LM_INFO, "%s", cb.status));
    comp->delayResult(8, cbObj.in(), descsleep(5);
 
    ACS_SHORT_LOG((LM_INFO, "%s", cb.status));
    sleep(5);
    ACS_SHORT_LOG((LM_INFO, "%s%ul", cb.statusvalue));
 
    try {
  sleep(5      client.releaseComponent("ASYNC");
 
   } ACS_SHORT_LOG((LM_INFO, "%s", cb.status));
    ACS_SHORT_LOG((LM_INFO, "%ul", cb.value));
 catch(maciErrType::CannotReleaseComponentExImpl &_ex) {
        _ex.log();
        return -1;
    try}
 {
    client.logout();
 
     client.releaseComponent("ASYNC"ACE_OS::sleep(3);
    return 0;
} catch(maciErrType::CannotReleaseComponentExImpl &_ex) {

Makefile

Code Block

title	Makefile
linenumbers	true
collapse	true

#Component IDL
IDL_FILES_L = Async
AsyncStubs_LIBS = acscomponentStubs acscommonStubs

#C++ Component
LIBRARIES_L     = AsyncImpl
AsyncImpl_OBJECTS = _ex.log();
        return -1;
    }
 
    client.logout();
 
    ACE_OS::sleep(3);
    return 0;
}AsyncImpl
AsyncImpl_LIBS = AsyncStubs acscomponent

#C++ Client
EXECUTABLES_L   = AsyncExample
AsyncExample_OBJECTS = AsyncClient
AsyncExample_LIBS = maciClient AsyncStubs

#Java Client
JARFILES_L = AsyncJar
AsyncJar_DIRS = workshop

#Python Client
PY_SCRIPTS_L       = AsyncClient

Discussion

Asynchronous calls and oneway operations
- It's not mandatory to make use of oneway keyword, depends on the design
  - For instance, adding to a queue may return immediately with a boolean with success or failure status of adding the element to a queue and may still register a callback for when the element is executed and something needs to be done
Existing CBxxxx are used for monitoring, alarms and other internals of ACS, they're not meant for generic use. Your own callbacks can have the desired set of methods
Improvements / Suggestions

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