GetFileRequest.java

/*
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/*
 * FileRequest.java
 *
 * Created on July 5, 2002, 12:04 PM
 */

package org.dcache.srm.request;

import org.apache.axis.types.UnsignedLong;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.dao.DataAccessException;

import java.net.URI;

import diskCacheV111.srm.RequestFileStatus;

import org.dcache.srm.FileMetaData;
import org.dcache.srm.PinCallbacks;
import org.dcache.srm.SRM;
import org.dcache.srm.SRMAuthorizationException;
import org.dcache.srm.SRMException;
import org.dcache.srm.SRMInvalidRequestException;
import org.dcache.srm.SRMUser;
import org.dcache.srm.UnpinCallbacks;
import org.dcache.srm.scheduler.FatalJobFailure;
import org.dcache.srm.scheduler.IllegalStateTransition;
import org.dcache.srm.scheduler.NonFatalJobFailure;
import org.dcache.srm.scheduler.Scheduler;
import org.dcache.srm.scheduler.State;
import org.dcache.srm.v2_2.TGetRequestFileStatus;
import org.dcache.srm.v2_2.TReturnStatus;
import org.dcache.srm.v2_2.TSURLReturnStatus;
import org.dcache.srm.v2_2.TStatusCode;
/**
 *
 * @author  timur
 * @version
 */
public final class GetFileRequest extends FileRequest<GetRequest> {
    private final static Logger logger = LoggerFactory.getLogger(GetFileRequest.class);

    private URI surl;
    private URI turl;
    private String pinId;
    private String fileId;

    /**
     * Transient, since we do not need to replicate the field,
     * the field is needed only in jvm where the request is originally
     * scheduled
     */
    private transient FileMetaData fileMetaData;

    /** Creates new FileRequest */
    public GetFileRequest(long requestId,
                          Long  requestCredentalId,
                          URI surl,
                          long lifetime,
                          int maxNumberOfRetries)
    {
        super(requestId,
            requestCredentalId,
            lifetime,
            maxNumberOfRetries);
        logger.debug("GetFileRequest, requestId="+requestId+" fileRequestId = "+getId());
        this.surl = surl;
    }

    /**
     * restore constructore, used for restoring the existing
     * file request from the database
     */

    public GetFileRequest(
    long id,
    Long nextJobId,
    long creationTime,
    long lifetime,
    int stateId,
    String errorMessage,
    String scheduelerId,
    long schedulerTimeStamp,
    int numberOfRetries,
    int maxNumberOfRetries,
    long lastStateTransitionTime,
    JobHistory[] jobHistoryArray,
    long requestId,
    Long  requestCredentalId,
    String statusCodeString,
    String SURL,
    String TURL,
    String fileId,
    String pinId
    ) {
        super(id,
        nextJobId,
        creationTime,
        lifetime,
        stateId,
        errorMessage,
        scheduelerId,
        schedulerTimeStamp,
        numberOfRetries,
        maxNumberOfRetries,
        lastStateTransitionTime,
        jobHistoryArray,
        requestId,
        requestCredentalId,
        statusCodeString);

        this.surl = URI.create(SURL);
        if(TURL != null && !TURL.equalsIgnoreCase("null")) {
            this.turl = URI.create(TURL);
        }

        if(fileId != null && (!fileId.equalsIgnoreCase("null"))) {
            this.fileId = fileId;
        }

        if(pinId != null && (!pinId.equalsIgnoreCase("null"))) {
            this.pinId = pinId;
        }
    }

    public void setPinId(String pinId) {
        wlock();
        try {
            this.pinId = pinId;
        } finally {
            wunlock();
        }
    }

    public String getPinId() {
        rlock();
        try {
            return pinId;
        } finally {
            runlock();
        }
    }

    public boolean isPinned() {
        return getPinId() != null;
    }

    public URI getSurl() {
        rlock();
        try {
            return surl;
        } finally {
            runlock();
        }
    }

    public URI getTurl() {
        rlock();
        try {
            return turl;
        } finally {
            runlock();
        }
    }

    public final String getSurlString() {
        return getSurl().toASCIIString();
    }

    public String getTurlString()  {
        rlock();
        try {
            if (turl != null) {
                return turl.toASCIIString();
            }
        } finally {
            runlock();
        }
        return null;
    }


    public String getFileId() {
        rlock();
        try {
           return fileId;
        } finally {
            runlock();
        }
    }


    @Override
    public RequestFileStatus getRequestFileStatus(){
        RequestFileStatus rfs;
        if(getFileMetaData() != null) {
            rfs = new RequestFileStatus(getFileMetaData());
        }
        else {
            rfs = new RequestFileStatus();
        }

        rfs.fileId = (int) getId();
        rfs.SURL = getSurlString();



        if(this.isPinned()) {
            rfs.isPinned = true;
            rfs.isCached = true;
        }

        State state = getState();
        rfs.TURL = getTurlString();
        if(state == State.DONE) {
            rfs.state = "Done";
        }
        else if(state == State.READY) {
            rfs.state = "Ready";
        }
        else if(state == State.TRANSFERRING) {
            rfs.state = "Running";
        }
        else if(state == State.FAILED
        || state == State.CANCELED ) {
            rfs.state = "Failed";
        }
        else {
            rfs.state = "Pending";
        }

        //logger.debug(" returning requestFileStatus for "+rfs.toString());
        return rfs;
    }

    public TGetRequestFileStatus getTGetRequestFileStatus()
            throws SRMInvalidRequestException {
        TGetRequestFileStatus fileStatus = new TGetRequestFileStatus();
        if(getFileMetaData() != null) {
            fileStatus.setFileSize(new UnsignedLong(getFileMetaData().size));
        }

        try {
             fileStatus.setSourceSURL(new org.apache.axis.types.URI(getSurlString()));
        } catch (org.apache.axis.types.URI.MalformedURIException e) {
            logger.error(e.toString());
            throw new SRMInvalidRequestException("wrong surl format");
        }

        String turlstring = getTurlString();
        if(turlstring != null) {
            try {
            fileStatus.setTransferURL(new org.apache.axis.types.URI(turlstring));
            } catch (org.apache.axis.types.URI.MalformedURIException e) {
                logger.error(e.toString());
                throw new SRMInvalidRequestException("wrong turl format");
            }

        }
        if(this.isPinned()) {

            fileStatus.setRemainingPinTime((int)(getRemainingLifetime()/1000));
        }
        fileStatus.setEstimatedWaitTime(getContainerRequest().getRetryDeltaTime());
        fileStatus.setStatus(getReturnStatus());

        return fileStatus;
    }

    public TSURLReturnStatus  getTSURLReturnStatus() throws SRMInvalidRequestException
    {
        try {
            return new TSURLReturnStatus(new org.apache.axis.types.URI(getSurlString()), getReturnStatus());
        } catch (org.apache.axis.types.URI.MalformedURIException e) {
            logger.error(e.toString());
            throw new SRMInvalidRequestException("wrong surl format");
        }
    }

    @Override
    public void toString(StringBuilder sb, boolean longformat) {
        sb.append(" GetFileRequest ");
        sb.append(" id:").append(getId());
        sb.append(" priority:").append(getPriority());
        sb.append(" creator priority:");
        try {
            sb.append(getUser().getPriority());
        } catch (SRMInvalidRequestException ire) {
            sb.append("Unknown");
        }
        State state = getState();
        sb.append(" state:").append(state);
        if(longformat) {
            sb.append('\n').append("   SURL: ").append(getSurlString());
            sb.append('\n').append("   pinned: ").append(isPinned());
            String thePinId = getPinId();
            if(thePinId != null) {
                sb.append('\n').append("   pinid: ").append(thePinId);
            }
            sb.append('\n').append("   TURL: ").append(getTurlString());
            sb.append('\n').append("   status code:").append(getStatusCode());
            sb.append('\n').append("   error message:").append(getErrorMessage());
            sb.append('\n').append("   History of State Transitions: \n");
            sb.append(getHistory());
        }
    }

    @Override
    public synchronized void run() throws NonFatalJobFailure, FatalJobFailure {
        logger.debug("run()");
        try {
            if(getPinId() == null) {
                // [ SRM 2.2, 5.2.2, g)] The file request must fail with an error SRM_FILE_BUSY
                // if srmPrepareToGet requests for files which there is an active srmPrepareToPut
                // (no srmPutDone is yet called) request for.
                //
                // [ SRM 2.2, 5.1.3] SRM_FILE_BUSY: client requests for a file which there is an
                // active srmPrepareToPut (no srmPutDone is yet called) request for.
                if (SRM.getSRM().isFileBusy(surl)) {
                    setStateAndStatusCode(State.FAILED, "The requested SURL is being used by another client.",
                            TStatusCode.SRM_FILE_BUSY);
                }

                pinFile();
                if(getPinId() == null) {
                    setState(State.ASYNCWAIT, "Pinning file.");
                    logger.debug("GetFileRequest: waiting async notification about pinId...");
                    return;
                }
            }

            try {
                computeTurl();
            } catch (SRMAuthorizationException e) {
                String error =e.getMessage();
                logger.error(error);
                try {
                    setStateAndStatusCode(
                            State.FAILED,
                            error,
                            TStatusCode.SRM_AUTHORIZATION_FAILURE);
                } catch(IllegalStateTransition ist) {
                    logger.error("Illegal State Transition : " + ist.getMessage());
                }
            } catch (SRMException e) {
                String error = "cannot obtain turl for file:" + e.getMessage();
                logger.error(error);
                try {
                    setState(State.FAILED,error);
                } catch(IllegalStateTransition ist) {
                    logger.error("Illegal State Transition : " + ist.getMessage());
                }
            }
        } catch (IllegalStateTransition | DataAccessException | SRMException e) {
            // FIXME some SRMException failures are temporary and others are
            // permanent.  Code currently doesn't distinguish between them and
            // always retries, even if problem isn't transitory.
            throw new NonFatalJobFailure(e.toString());
        }
        logger.info("PinId is "+getPinId()+" returning, scheduler should change state to \"Ready\"");

    }

    public void pinFile()
        throws NonFatalJobFailure, FatalJobFailure, SRMException
    {
        GetRequest request = getContainerRequest();
        if (!isProtocolSupported(request.protocols)) {
            throw new FatalJobFailure("Transfer protocols not supported");
        }

        URI surl = getSurl();
        logger.info("Pinning {}", surl);
        getStorage().pinFile(getUser(),
                             surl,
                             getContainerRequest().getClient_host(),
                             lifetime,
                             String.valueOf(getRequestId()),
                             new ThePinCallbacks(getId()));
    }

    @Override
    protected void stateChanged(State oldState) {
        State state = getState();
        logger.debug("State changed from "+oldState+" to "+getState());
        if(state == State.READY) {
            try {
                getContainerRequest().resetRetryDeltaTime();
            } catch (SRMInvalidRequestException ire) {
                logger.error(ire.toString());
            }
        }

        if(State.isFinalState(state)) {
            if(getFileId() != null && getPinId() != null) {
                UnpinCallbacks callbacks = new TheUnpinCallbacks(this.getId());
                logger.info("state changed to final state, unpinning fileId= "+ getFileId()+" pinId = "+getPinId());
                SRMUser user;
                try {
                    user = getUser();
                } catch (SRMInvalidRequestException ire) {
                    logger.error(ire.toString()) ;
                    return;
                }
                getStorage().unPinFile(user,getFileId(),callbacks, getPinId());
            }
        }

        super.stateChanged(oldState);
    }

    private void computeTurl() throws SRMException
    {
        URI turl;
        GetRequest request = getContainerRequest();
        String firstDcapTurl = request.getFirstDcapTurl();
        if (firstDcapTurl != null) {
            turl = getStorage().getGetTurl(getUser(),
                    getSurl(),
                    URI.create(firstDcapTurl));
        } else {
            turl = getStorage().getGetTurl(getUser(),
                    getSurl(),
                    request.protocols);
            if (turl.getScheme().equals("dcap")) {
                request.setFirstDcapTurl(turl.toString());
            }
        }

        setTurl(turl);
    }

    @Override
    public boolean isTouchingSurl(URI surl)
    {
        return surl.equals(getSurl());
    }

    @Override
    public TReturnStatus getReturnStatus()
    {
        String description = getLastJobChange().getDescription();

        TStatusCode statusCode = getStatusCode();
        if (statusCode != null) {
            if (statusCode == TStatusCode.SRM_DONE || statusCode == TStatusCode.SRM_FILE_PINNED) {
                description = null;
            }
            return new TReturnStatus(statusCode, description);
        }

        switch (getState()) {
        case RESTORED:
        case PENDING:
        case RQUEUED:
            return new TReturnStatus(TStatusCode.SRM_REQUEST_QUEUED, description);
        case READY:
        case TRANSFERRING:
            return new TReturnStatus(TStatusCode.SRM_FILE_PINNED, null);
        case DONE:
            return new TReturnStatus(TStatusCode.SRM_RELEASED, null);
        case CANCELED:
            return new TReturnStatus(TStatusCode.SRM_ABORTED, description);
        case FAILED:
            return new TReturnStatus(TStatusCode.SRM_FAILURE, description);
        default:
            return new TReturnStatus(TStatusCode.SRM_REQUEST_INPROGRESS, description);
        }
    }


    /**
     *
     * @param newLifetime  new lifetime in millis
     *  -1 stands for infinite lifetime
     * @return int lifetime left in millis
     *    -1 stands for infinite lifetime
     */
    @Override
    public long extendLifetime(long newLifetime) throws SRMException {
        long remainingLifetime = getRemainingLifetime();
        if(remainingLifetime >= newLifetime) {
            return remainingLifetime;
        }
        long requestLifetime = getContainerRequest().extendLifetimeMillis(newLifetime);
        if(requestLifetime <newLifetime) {
            newLifetime = requestLifetime;
        }
        if(remainingLifetime >= newLifetime) {
            return remainingLifetime;
        }

        newLifetime = extendLifetimeMillis(newLifetime);
        if(remainingLifetime >= newLifetime) {
            return remainingLifetime;
        }
        if(getPinId() == null) {
            return newLifetime;
        }
        SRMUser user = getUser();
        return getStorage().extendPinLifetime(user,getFileId(), getPinId(),newLifetime);
    }

    /**
     * @param turl the turl to set
     */
    private void setTurl(URI turl) {
        wlock();
        try {
            this.turl = turl;
        } finally {
            wunlock();
        }
    }

    /**
     * @param fileId the fileId to set
     */
    private void setFileId(String fileId) {
        wlock();
        try {
            this.fileId = fileId;
        } finally {
            wunlock();
        }
    }

    /**
     * @return the fileMetaData
     */
    private FileMetaData getFileMetaData() {
        rlock();
        try {
             return fileMetaData;
        } finally {
            runlock();
        }
    }

    /**
     * @param fileMetaData the fileMetaData to set
     */
    private void setFileMetaData(FileMetaData fileMetaData) {
        wlock();
        try {
            this.fileMetaData = fileMetaData;
        } finally {
            wunlock();
        }
    }

    public TReturnStatus release()
    {
        wlock();
        try {
            State state = getState();
            switch (state) {
            case READY:
                setState(State.DONE, "TURL released.");
                return new TReturnStatus(TStatusCode.SRM_SUCCESS, null);
            case DONE:
                return new TReturnStatus(TStatusCode.SRM_SUCCESS, null);
            case CANCELED:
                return new TReturnStatus(TStatusCode.SRM_ABORTED, "SURL has been aborted and cannot be released");
            case FAILED:
                return new TReturnStatus(TStatusCode.SRM_FAILURE, "Pinning failed");
            default:
                setState(State.CANCELED, "Aborted by srmReleaseFile request.");
                return new TReturnStatus(TStatusCode.SRM_ABORTED, "SURL is not yet pinned, pinning aborted");
            }
        } catch (IllegalStateTransition e) {
            return new TReturnStatus(TStatusCode.SRM_FAILURE, e.getMessage());
        } finally {
            wunlock();
        }
    }

    private  static class ThePinCallbacks implements PinCallbacks {

        private final long fileRequestJobId;

        public ThePinCallbacks(long fileRequestJobId) {
            this.fileRequestJobId = fileRequestJobId;
        }

        public GetFileRequest getGetFileRequest()
            throws SRMInvalidRequestException
        {
            return Job.getJob(fileRequestJobId, GetFileRequest.class);
        }

        @Override
        public void FileNotFound(String reason) {
            try {
                GetFileRequest fr = getGetFileRequest();
                try {
                    fr.setStateAndStatusCode(State.FAILED,
                        reason,
                        TStatusCode.SRM_INVALID_PATH);
                }
                catch(IllegalStateTransition ist) {
                    logger.warn("Illegal State Transition : " +ist.getMessage());
                }
                logger.warn("GetCallbacks error: "+ reason);
            }
            catch(Exception e) {
                logger.error(e.toString());
            }
        }

        @Override
        public void Unavailable(String reason) {
            try {
                GetFileRequest fr = getGetFileRequest();
                try {
                    fr.setStateAndStatusCode(State.FAILED,
                                             reason,
                                             TStatusCode.SRM_FILE_UNAVAILABLE);
                }
                catch(IllegalStateTransition ist) {
                    logger.warn("Illegal State Transition : " +ist.getMessage());
                }
                logger.error("GetCallbacks error: "+ reason);
            }
            catch(Exception e) {
                logger.error(e.toString());
            }
        }

        @Override
        public void Error( String error) {
            try {
                GetFileRequest fr = getGetFileRequest();
                try {
                    fr.setState(State.FAILED,error);
                }
                catch(IllegalStateTransition ist) {
                    logger.warn("Illegal State Transition : " +ist.getMessage());
                }
                logger.error("ThePinCallbacks error: "+ error);
            }
            catch(Exception e) {
                logger.error(e.toString());
            }
        }

        @Override
        public void Exception( Exception e) {
            try {
                GetFileRequest fr = getGetFileRequest();
                try {
                    fr.setState(State.FAILED,e.toString());
                }
                catch(IllegalStateTransition ist) {
                    logger.warn("Illegal State Transition : " +ist.getMessage());
                }
                logger.error("ThePinCallbacks exception",e);
            }
            catch(Exception e1) {
                logger.error(e1.toString());
            }
        }




        @Override
        public void Timeout() {
            try {
                GetFileRequest fr = getGetFileRequest();
                try {
                    fr.setState(State.FAILED, "Pin operation timed out.");
                }
                catch(IllegalStateTransition ist) {
                    logger.warn("Illegal State Transition : " +ist.getMessage());
                }

                logger.error("GetCallbacks Timeout");
            }
            catch(Exception e) {
                logger.error(e.toString());
            }
        }

        @Override
        public void Pinned(FileMetaData fileMetaData, String pinId) {
            try {
                logger.debug("File pinned (pinId={})", pinId);

                GetFileRequest fr = getGetFileRequest();
                fr.wlock();
                try {
                    State state = fr.getState();
                    if (state == State.ASYNCWAIT || state == State.RUNNING) {
                        fr.setFileId(fileMetaData.fileId);
                        fr.setFileMetaData(fileMetaData);
                        fr.setPinId(pinId);
                        if (state == State.ASYNCWAIT) {
                            Scheduler scheduler =
                                Scheduler.getScheduler(fr.getSchedulerId());
                            scheduler.schedule(fr);
                        }
                    }
                } finally {
                    fr.wunlock();
                }
            } catch (InterruptedException e) {
                logger.error(e.getMessage());
                Thread.currentThread().interrupt();
            } catch (SRMInvalidRequestException e) {
                logger.error("BringOnlineFileRequest failed: {}", e.getMessage());
            } catch (IllegalStateTransition e) {
                logger.warn("Illegal State Transition: {}", e.getMessage());
            }
        }

        @Override
        public void PinningFailed(String reason) {
            try {
                GetFileRequest fr = getGetFileRequest();
                try {
                    fr.setState(State.FAILED,reason);
                }
                catch(IllegalStateTransition ist) {
                    logger.warn("Illegal State Transition : " +ist.getMessage());
                }

                logger.error("ThePinCallbacks error: "+ reason);
            }
            catch(Exception e) {
                logger.error(e.toString());
            }
        }

    }

    private  static class TheUnpinCallbacks implements UnpinCallbacks {

        private final long fileRequestJobId;

        public TheUnpinCallbacks(long fileRequestJobId) {
            this.fileRequestJobId = fileRequestJobId;
        }

        public GetFileRequest getGetFileRequest()
                throws SRMInvalidRequestException {
            return Job.getJob(fileRequestJobId, GetFileRequest.class);
        }

        @Override
        public void Error( String error) {
            try {
                GetFileRequest fr = getGetFileRequest();
                logger.error("TheUnpinCallbacks error: "+ error);
            }
            catch(Exception e) {
                logger.error(e.toString());
            }
        }

        @Override
        public void Exception( Exception e) {
            try {
                GetFileRequest fr = getGetFileRequest();
                logger.error("TheUnpinCallbacks exception",e);
            }
            catch(Exception e1) {
                logger.error(e1.toString());
            }
        }




        @Override
        public void Timeout() {
            try {
                GetFileRequest fr = getGetFileRequest();
                logger.error("TheUnpinCallbacks Timeout");
            }
            catch(Exception e) {
                logger.error(e.toString());
            }
        }

        @Override
        public void Unpinned(String pinId) {
            try {
                GetFileRequest fr = getGetFileRequest();
                logger.debug("TheUnpinCallbacks: Unpinned() pinId:"+pinId);
                State state = fr.getState();
               if(state == State.ASYNCWAIT) {
                    fr.setPinId(pinId);
                    Scheduler scheduler = Scheduler.getScheduler(fr.getSchedulerId());
                    try {
                        scheduler.schedule(fr);
                    }
                    catch(Exception ie) {
                        logger.error(ie.toString());
                    }
                }
            }
            catch(Exception e) {
                logger.error(e.toString());
            }
        }

        @Override
        public void UnpinningFailed(String reason) {
            try {
                GetFileRequest fr = getGetFileRequest();
                logger.error("TheUnpinCallbacks error: "+ reason);
            }
            catch(Exception e) {
                logger.error(e.toString());
            }
        }
    }
}