org.sca4j.binding.ftp.runtime.BindingFtpLet Maven / Gradle / Ivy
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*
* This project contains code licensed from the Apache Software Foundation under
* the Apache License, Version 2.0 and original code from project contributors.
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* Copyright (c) 2007 - 2008 fabric3 project contributors
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* is included in this distrubtion or you may obtain a copy at
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* under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
* CONDITIONS OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*
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* the Apache License, Version 2.0 and original code from project contributors.
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package org.sca4j.binding.ftp.runtime;
import java.io.InputStream;
import java.util.List;
import java.util.Map;
import org.sca4j.ftp.api.FtpConstants;
import org.sca4j.ftp.api.FtpLet;
import org.sca4j.ftp.api.Session;
import org.sca4j.spi.invocation.Message;
import org.sca4j.spi.invocation.MessageImpl;
import org.sca4j.spi.invocation.WorkContext;
import org.sca4j.spi.model.physical.PhysicalOperationDefinition;
import org.sca4j.spi.model.physical.PhysicalOperationPair;
import org.sca4j.spi.wire.InvocationChain;
import org.sca4j.spi.wire.Wire;
/**
* Handles incoming FTP puts from the protocol stack.
*
* @version $Revision$ $Date$
*/
public class BindingFtpLet implements FtpLet {
private String servicePath;
private BindingMonitor monitor;
private InvocationChain downloadChain;
private InvocationChain uploadChain;
public BindingFtpLet(String servicePath, Wire wire, BindingMonitor monitor) {
this.servicePath = servicePath;
this.monitor = monitor;
Map invocationChains = wire.getInvocationChains();
if (invocationChains.size() <= 0 || invocationChains.size() > 2) {
throw new AssertionError("Expects one download and/or an upload method");
}
for (Map.Entry entry : invocationChains.entrySet()) {
PhysicalOperationDefinition opd = entry.getKey().getSourceOperation();
List parameters = opd.getParameters();
if (parameters.size() == 1) {
if (!"java.lang.String".equals(parameters.get(0)) ) {
throw new AssertionError("Download methods take a single string argument");
}
if (!"java.io.InputStream".equals(opd.getReturnType())) {
throw new AssertionError("Download methods need to return an input stream");
}
downloadChain = entry.getValue();
} else if (parameters.size() == 2) {
if (!"java.lang.String".equals(parameters.get(0)) ) {
throw new AssertionError("Upload methods take a string and an input stream");
}
if (!"java.io.InputStream".equals(parameters.get(1)) ) {
throw new AssertionError("Upload methods take a string and an input stream");
}
uploadChain = entry.getValue();
} else {
throw new AssertionError("Unsupported operation signature: " + opd.getName());
}
}
}
public boolean onUpload(String fileName, Session ftpSession, InputStream uploadData) throws Exception {
if (uploadChain == null) {
throw new Exception("Target component doesn't support upload");
}
Object[] args = new Object[] {fileName, uploadData};
WorkContext workContext = new WorkContext();
workContext.setHeader(FtpConstants.HEADER_CONTENT_TYPE, ftpSession.getContentType());
workContext.setHeader(FtpConstants.COMMANDS, ftpSession.getSiteCommands());
Message input = new MessageImpl(args, false, workContext);
Message msg = uploadChain.getHeadInterceptor().invoke(input);
if (msg.isFault()) {
monitor.fileProcessingError(servicePath, (Throwable) msg.getBody());
return false;
}
return true;
}
public InputStream onDownload(String fileName, Session ftpSession) throws Exception {
if (downloadChain == null) {
throw new Exception("Target component doesn't support download");
}
Object[] args = new Object[] {fileName};
WorkContext workContext = new WorkContext();
workContext.setHeader(FtpConstants.HEADER_CONTENT_TYPE, ftpSession.getContentType());
workContext.setHeader(FtpConstants.COMMANDS, ftpSession.getSiteCommands());
Message input = new MessageImpl(args, false, workContext);
Message msg = downloadChain.getHeadInterceptor().invoke(input);
if (msg.isFault()) {
throw (Exception) msg.getBody();
}
return (InputStream) msg.getBody();
}
}