// The working supervisor...
public void run() {
// Create and start the clerk threads
for (Clerk clerk : clerkTeam) {
threadPool.submit(clerk);
}
atWork = true; // We are ready to receive transactions
boolean done = false;
while (true) {
while (inTray.size() == 0) { // No transaction waiting?
try {
Thread.sleep(200); // then take a break
if (inTray.size() != 0) { // If a transaction has been posted
break; // ...continue operations
} else { // ...otherwise...
shutdownClerks(); // ...tell the clerks to go home...
return; // ...we are done for the day!
}
} catch (InterruptedException e) {
// Interrupted while idle, so shut down the clerks and return...
shutdownClerks();
return;
}
}
Transaction transaction = inTray.remove(0);
try { // Processing the transction...
System.out.println(this + " working...");
Thread.sleep(100 * (1 + rand.nextInt(5))); // ...takes a while (100 to 500msec)
} catch (InterruptedException e) {
System.out.println(this + " interrupted while processing transaction. Continuing...");
}
// Allocate the transaction to a clerk...
done = false;
while (true) {
// Find a clerk to do the transaction
for (Clerk clerk : clerkTeam) {
if (done = clerk.doTransaction(transaction)) break;
}
if (done) {
break;
}
// No clerk was free so wait a while
try {
Thread.sleep(100);
} catch (InterruptedException e) {
System.out.println(this + " interrupted waiting for a free clerk. Continuing...\n");
}
}
}
}
private void shutdownClerks() {
// Tell the clerks we are done for the day...
for (Clerk clerk : clerkTeam) {
clerk.end();
}
threadPool.shutdown();
try {
threadPool.awaitTermination(10L, TimeUnit.SECONDS);
} catch (InterruptedException e) {
System.out.println(e);
}
if (threadPool.isTerminated()) {
System.out.println("\nAll clerks for " + this + " have completed their tasks.\n");
} else {
System.out.println("\nClerks still running - shutting down anyway.\n");
threadPool.shutdownNow();
}
}
public void run() {
System.out.println("消費者開始消耗整數......");
for (int i = 1; i <= 10; i++) {
try {
clerk.getProduct();
} catch (InterruptedException ex) {
throw new RuntimeException(ex);
}
}
}