com.netbout.spi.cpa.CpaHelper Maven / Gradle / Ivy
/**
* Copyright (c) 2009-2012, Netbout.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 NetBout.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.netbout.spi.cpa;
import com.jcabi.log.Logger;
import com.netbout.spi.Helper;
import com.netbout.spi.Identity;
import com.netbout.spi.Token;
import java.net.URL;
import java.util.Set;
import java.util.concurrent.ConcurrentMap;
/**
* Classpath annotations helper.
*
* Your classes should be annotated with @Farm and
* @Operation annotations.
*
* @author Yegor Bugayenko ([email protected])
* @version $Id$
*/
@SuppressWarnings("PMD.TooManyMethods")
public final class CpaHelper implements Helper {
/**
* Who am I.
*/
private final transient Identity identity;
/**
* Where this helper lives.
*/
private final transient URL home;
/**
* All discovered operations.
*/
private final transient ConcurrentMap ops;
/**
* Public ctor.
* @param idnt The identity, which this helper will act on behalf of
* @param url Jar URL where to get the code
*/
public CpaHelper(final Identity idnt, final URL url) {
this.identity = idnt;
this.home = url;
this.ops = this.discover(url);
}
/**
* {@inheritDoc}
*/
@Override
public URL location() {
return this.home;
}
/**
* {@inheritDoc}
*/
@Override
public Set supports() {
return this.ops.keySet();
}
/**
* {@inheritDoc}
*/
@Override
public void close() {
// nothing to do here
}
/**
* {@inheritDoc}
*/
@Override
public void execute(final Token token) {
if (!this.ops.containsKey(token.mnemo())) {
throw new IllegalArgumentException(
String.format(
"Operation '%s' not supported by '%s' (%s)",
token.mnemo(),
this.identity.name(),
this.home
)
);
}
final long start = System.nanoTime();
this.ops.get(token.mnemo()).execute(token);
Logger.debug(
this,
"#execute('%s'): done in %[nano]s",
token.mnemo(),
System.nanoTime() - start
);
}
/**
* Initialize.
* @param url URL where to get the code
* @return Discovered ops
*/
private ConcurrentMap discover(final URL url) {
final long start = System.nanoTime();
final ConcurrentMap found =
new OpDiscoverer(this.identity).discover(url);
Logger.info(
this,
"#init('%s'): %d operations discovered in %[nano]s: %[list]s",
url,
found.size(),
System.nanoTime() - start,
found.keySet()
);
return found;
}
}