InstrumentationServiceProvider.java
/*-
* #%L
* io.earcam.instrumental.agent
* %%
* Copyright (C) 2018 earcam
* %%
* SPDX-License-Identifier: (BSD-3-Clause OR EPL-1.0 OR Apache-2.0 OR MIT)
*
* You <b>must</b> choose to accept, in full - any individual or combination of
* the following licenses:
* <ul>
* <li><a href="https://opensource.org/licenses/BSD-3-Clause">BSD-3-Clause</a></li>
* <li><a href="https://www.eclipse.org/legal/epl-v10.html">EPL-1.0</a></li>
* <li><a href="https://www.apache.org/licenses/LICENSE-2.0">Apache-2.0</a></li>
* <li><a href="https://opensource.org/licenses/MIT">MIT</a></li>
* </ul>
* #L%
*/
package io.earcam.instrumental.agent;
import java.lang.instrument.Instrumentation;
import java.nio.file.Path;
import java.util.Objects;
import io.earcam.unexceptional.Exceptional;
/**
* <p>
* InstrumentationServiceProvider class.
* </p>
*
*/
public final class InstrumentationServiceProvider extends InstrumentationWrapper {
static volatile Instrumentation instance;
/**
* <p>
* Constructor for InstrumentationServiceProvider.
* </p>
*/
public InstrumentationServiceProvider()
{
attach();
setDelegate(instance);
}
private static void attach()
{
if(instance == null) {
Path agentJar = StubAgentJar.stubAgentJar("fake-agent-", FakeAgent.class);
Exceptional.accept(Attach::attach, agentJar.toUri(), "");
Objects.requireNonNull(instance);
}
}
}