/**
* Copyright (c) 2012-2014, s3auth.com
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met: 1) Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer. 2) Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution. 3) Neither the name of the s3auth.com nor
* the names of its contributors may be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
* NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.s3auth.hosts;
import com.jcabi.aspects.Immutable;
import com.jcabi.aspects.Loggable;
import java.io.IOException;
import java.io.OutputStream;
import java.net.URI;
import java.util.Collection;
import java.util.Date;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import lombok.EqualsAndHashCode;
import lombok.ToString;
import org.productivity.java.syslog4j.SyslogIF;
import org.productivity.java.syslog4j.impl.net.udp.UDPNetSyslog;
import org.productivity.java.syslog4j.impl.net.udp.UDPNetSyslogConfig;
/**
* Decorator of {@link Hosts}, adds syslog capabilities for each domain.
*
* <p>The class is immutable and thread-safe.</p>
*
* @author Carlos Miranda (miranda.cma@gmail.com)
* @version $Id$
*/
@Immutable
@ToString
@EqualsAndHashCode(of = "hosts")
@Loggable(Loggable.DEBUG)
@SuppressWarnings("PMD.TooManyMethods")
public final class SyslogHosts implements Hosts {
/**
* The underlying Hosts instance.
*/
private final transient Hosts hosts;
/**
* Public ctor.
* @param hsts The hosts to add syslog capability to
*/
public SyslogHosts(final Hosts hsts) {
this.hosts = hsts;
}
@Override
public void close() throws IOException {
this.hosts.close();
}
@Override
public Host find(final String domain) throws IOException {
return new SyslogHost(this.hosts.find(domain));
}
@Override
public Set<Domain> domains(final User user) throws IOException {
return this.hosts.domains(user);
}
/**
* Syslog host wrapper.
*/
@Immutable
@EqualsAndHashCode(of = "host")
private static final class SyslogHost implements Host {
/**
* Pattern for matching syslog host and port.
*/
private static final Pattern PATTERN = Pattern.compile(
"(\\w+)(:(\\d+))?"
);
/**
* The underlying Host instance.
*/
private final transient Host host;
/**
* Constructor.
* @param hst Host
*/
SyslogHost(final Host hst) {
this.host = hst;
}
@Override
public void close() throws IOException {
this.host.close();
}
@Override
public Resource fetch(final URI uri, final Range range,
final Version version) throws IOException {
final Matcher matcher = PATTERN.matcher(this.host.syslog());
final Resource res;
if (matcher.find()) {
final String syslg = matcher.group(1);
final int port;
// @checkstyle MagicNumber (4 lines)
if (matcher.group(3) == null) {
port = 514;
} else {
port = Integer.parseInt(matcher.group(3));
}
res = new SyslogResource(
this.host.fetch(uri, range, version), uri, syslg, port
);
} else {
res = this.host.fetch(uri, range, version);
}
return res;
}
@Override
public boolean isHidden(final URI uri) throws IOException {
return this.host.isHidden(uri);
}
@Override
public boolean authorized(final String user, final String password)
throws IOException {
return this.host.authorized(user, password);
}
@Override
public String syslog() {
return this.host.syslog();
}
@Override
public Stats stats() {
return this.host.stats();
}
}
/**
* Syslog Resource wrapper.
*/
private static final class SyslogResource implements Resource {
/**
* The underlying resource.
*/
private final transient Resource resource;
/**
* URI of the resource.
*/
private final transient URI location;
/**
* The syslog client.
*/
private final transient SyslogIF syslog;
/**
* Constructor.
* @param res The underlying resource
* @param uri The URI to fetch
* @param syslg The syslog host
* @param port The syslog port
* @checkstyle ParameterNumber (4 lines)
*/
SyslogResource(final Resource res, final URI uri, final String syslg,
final int port) {
this.resource = res;
this.location = uri;
this.syslog = new UDPNetSyslog();
this.syslog.initialize("udp", new UDPNetSyslogConfig(syslg, port));
}
@Override
public int status() {
return this.resource.status();
}
@Override
public long writeTo(final OutputStream stream) throws IOException {
long bytes = 0L;
try {
bytes = this.resource.writeTo(stream);
this.syslog.info(
String.format(
"Obtained %d bytes from %s", bytes, this.location
)
);
} catch (final IOException exp) {
this.syslog.error(
String.format(
"Exception thrown when obtaining %s with message %s",
this.location,
exp.getMessage()
)
);
throw exp;
}
return bytes;
}
@Override
public Collection<String> headers() throws IOException {
return this.resource.headers();
}
@Override
public String etag() {
return this.resource.etag();
}
@Override
public Date lastModified() {
return this.resource.lastModified();
}
@Override
public String contentType() {
return this.resource.contentType();
}
@Override
public void close() throws IOException {
this.resource.close();
}
}
}