/*
* Copyright 2012-2017 the original author or authors.
*
* 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.
*/
package org.springframework.boot.devtools.remote.client;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.net.ConnectException;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.boot.devtools.classpath.ClassPathChangedEvent;
import org.springframework.boot.devtools.filewatch.ChangedFile;
import org.springframework.boot.devtools.filewatch.ChangedFiles;
import org.springframework.boot.devtools.restart.classloader.ClassLoaderFile;
import org.springframework.boot.devtools.restart.classloader.ClassLoaderFile.Kind;
import org.springframework.boot.devtools.restart.classloader.ClassLoaderFiles;
import org.springframework.context.ApplicationListener;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.client.ClientHttpRequest;
import org.springframework.http.client.ClientHttpRequestFactory;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.util.Assert;
import org.springframework.util.FileCopyUtils;
/**
* Listens and pushes any classpath updates to a remote endpoint.
*
* @author Phillip Webb
* @author Andy Wilkinson
* @since 1.3.0
*/
public class ClassPathChangeUploader
implements ApplicationListener<ClassPathChangedEvent> {
private static final Map<ChangedFile.Type, ClassLoaderFile.Kind> TYPE_MAPPINGS;
static {
Map<ChangedFile.Type, ClassLoaderFile.Kind> map = new HashMap<>();
map.put(ChangedFile.Type.ADD, ClassLoaderFile.Kind.ADDED);
map.put(ChangedFile.Type.DELETE, ClassLoaderFile.Kind.DELETED);
map.put(ChangedFile.Type.MODIFY, ClassLoaderFile.Kind.MODIFIED);
TYPE_MAPPINGS = Collections.unmodifiableMap(map);
}
private static final Log logger = LogFactory.getLog(ClassPathChangeUploader.class);
private final URI uri;
private final ClientHttpRequestFactory requestFactory;
public ClassPathChangeUploader(String url, ClientHttpRequestFactory requestFactory) {
Assert.hasLength(url, "URL must not be empty");
Assert.notNull(requestFactory, "RequestFactory must not be null");
try {
this.uri = new URL(url).toURI();
}
catch (URISyntaxException ex) {
throw new IllegalArgumentException("Malformed URL '" + url + "'");
}
catch (MalformedURLException ex) {
throw new IllegalArgumentException("Malformed URL '" + url + "'");
}
this.requestFactory = requestFactory;
}
@Override
public void onApplicationEvent(ClassPathChangedEvent event) {
try {
ClassLoaderFiles classLoaderFiles = getClassLoaderFiles(event);
byte[] bytes = serialize(classLoaderFiles);
performUpload(classLoaderFiles, bytes);
}
catch (IOException ex) {
throw new IllegalStateException(ex);
}
}
private void performUpload(ClassLoaderFiles classLoaderFiles, byte[] bytes)
throws IOException {
try {
while (true) {
try {
ClientHttpRequest request = this.requestFactory
.createRequest(this.uri, HttpMethod.POST);
HttpHeaders headers = request.getHeaders();
headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
headers.setContentLength(bytes.length);
FileCopyUtils.copy(bytes, request.getBody());
ClientHttpResponse response = request.execute();
Assert.state(response.getStatusCode() == HttpStatus.OK,
"Unexpected " + response.getStatusCode()
+ " response uploading class files");
logUpload(classLoaderFiles);
return;
}
catch (ConnectException ex) {
logger.warn("Failed to connect when uploading to " + this.uri
+ ". Upload will be retried in 2 seconds");
Thread.sleep(2000);
}
}
}
catch (InterruptedException ex) {
Thread.currentThread().interrupt();
throw new IllegalStateException(ex);
}
}
private void logUpload(ClassLoaderFiles classLoaderFiles) {
int size = classLoaderFiles.size();
logger.info(
"Uploaded " + size + " class " + (size == 1 ? "resource" : "resources"));
}
private byte[] serialize(ClassLoaderFiles classLoaderFiles) throws IOException {
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
ObjectOutputStream objectOutputStream = new ObjectOutputStream(outputStream);
objectOutputStream.writeObject(classLoaderFiles);
objectOutputStream.close();
return outputStream.toByteArray();
}
private ClassLoaderFiles getClassLoaderFiles(ClassPathChangedEvent event)
throws IOException {
ClassLoaderFiles files = new ClassLoaderFiles();
for (ChangedFiles changedFiles : event.getChangeSet()) {
String sourceFolder = changedFiles.getSourceFolder().getAbsolutePath();
for (ChangedFile changedFile : changedFiles) {
files.addFile(sourceFolder, changedFile.getRelativeName(),
asClassLoaderFile(changedFile));
}
}
return files;
}
private ClassLoaderFile asClassLoaderFile(ChangedFile changedFile)
throws IOException {
ClassLoaderFile.Kind kind = TYPE_MAPPINGS.get(changedFile.getType());
byte[] bytes = (kind == Kind.DELETED ? null
: FileCopyUtils.copyToByteArray(changedFile.getFile()));
long lastModified = (kind == Kind.DELETED ? System.currentTimeMillis()
: changedFile.getFile().lastModified());
return new ClassLoaderFile(kind, lastModified, bytes);
}
}