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/*-
* ============LICENSE_START=======================================================
* openECOMP : APP-C
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights
* reserved.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed 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.
* ============LICENSE_END=========================================================
*/
package org.openecomp.appc.adapter.netconf.internal;
import org.openecomp.appc.configuration.ConfigurationFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.concurrent.*;
/**
* Provides basic methods for exchanging netconf messages.
*/
public class NetconfAdapter {
private static final Logger LOG = LoggerFactory.getLogger(NetconfAdapter.class);
private static final long MAX_WAITING_TIME = 1800000;
private static ExecutorService executor = Executors.newFixedThreadPool(5);
// device input stream
private InputStream in;
// device output stream
private OutputStream out;
private long maxWaitingTime = ConfigurationFactory.getConfiguration().getLongProperty("org.openecomp.appc.netconf.recv.timeout", MAX_WAITING_TIME);
/**
* Constructor.
*
* @param in InputStream this instance will read netconf messages from
* @param out OutputStream this instance will write netconf messages to
* @throws IOException
*/
public NetconfAdapter(InputStream in, OutputStream out) throws IOException {
this.in = in;
this.out = out;
}
/**
* Receives netconf message from InputStream and return it's text (without netconf frame characters).
*
* @return text of message received from netconf device
* @throws IOException
*/
public String receiveMessage() throws IOException {
final NetconfMessage message = new NetconfMessage();
final byte[] buf = new byte[1024];
//int readByte = 1;
// Read data with timeout
Callable<Boolean> readTask = new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
int c;
while ((c = in.read(buf)) > 0) {
if (c > 0) {
message.append(buf, 0, c);
if (message.isCompleted()) {
break;
}
}
}
if (c < 0) {
return false;
}
return true;
}
};
Future<Boolean> future = executor.submit(readTask);
Boolean status;
try {
status = future.get(maxWaitingTime, TimeUnit.MILLISECONDS);
} catch (Exception e) {
throw new IOException(e);
}
if (status == false) {
throw new IOException("Failed to read netconf message");
}
String text = message.getText();
if (text != null) {
text = text.trim();
}
if (LOG.isDebugEnabled()) {
LOG.debug("Received message from netconf device:\n" + text);
}
return text;
}
/**
* Sends netconf message with provided text (adds netconf frame characters and sends the message).
*
* @param text text of message to be sent to netconf device
* @throws IOException
*/
public void sendMessage(final String text) throws IOException {
if (LOG.isDebugEnabled()) {
LOG.debug("Sending message to netconf device:\n" + text);
}
out.write(new NetconfMessage(text).getFrame());
out.flush();
}
}
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