/** Clean up the environment */
protected void shutdown() {
if (state == Coprocessor.State.ACTIVE) {
state = Coprocessor.State.STOPPING;
Thread currentThread = Thread.currentThread();
ClassLoader hostClassLoader = currentThread.getContextClassLoader();
try {
currentThread.setContextClassLoader(this.getClassLoader());
impl.stop(this);
state = Coprocessor.State.STOPPED;
} catch (IOException ioe) {
LOG.error("Error stopping coprocessor " + impl.getClass().getName(), ioe);
} finally {
currentThread.setContextClassLoader(hostClassLoader);
}
} else {
LOG.warn(
"Not stopping coprocessor "
+ impl.getClass().getName()
+ " because not active (state="
+ state.toString()
+ ")");
}
// clean up any table references
for (HTableInterface table : openTables) {
try {
((HTableWrapper) table).internalClose();
} catch (IOException e) {
// nothing can be done here
LOG.warn("Failed to close " + Bytes.toStringBinary(table.getTableName()), e);
}
}
}
/**
* Constructor
*
* @param impl the coprocessor instance
* @param priority chaining priority
*/
public Environment(
final Coprocessor impl, final int priority, final int seq, final Configuration conf) {
this.impl = impl;
this.classLoader = impl.getClass().getClassLoader();
this.priority = priority;
this.state = Coprocessor.State.INSTALLED;
this.seq = seq;
this.conf = conf;
}
/** Initialize the environment */
public void startup() throws IOException {
if (state == Coprocessor.State.INSTALLED || state == Coprocessor.State.STOPPED) {
state = Coprocessor.State.STARTING;
Thread currentThread = Thread.currentThread();
ClassLoader hostClassLoader = currentThread.getContextClassLoader();
try {
currentThread.setContextClassLoader(this.getClassLoader());
impl.start(this);
state = Coprocessor.State.ACTIVE;
} finally {
currentThread.setContextClassLoader(hostClassLoader);
}
} else {
LOG.warn(
"Not starting coprocessor "
+ impl.getClass().getName()
+ " because not inactive (state="
+ state.toString()
+ ")");
}
}