| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.uima.aae.error; |
| |
| import java.util.Arrays; |
| |
| public class Threshold { |
| private int threshold; |
| |
| private String action; |
| |
| private int window; |
| |
| private int maxRetries; |
| |
| private boolean continueOnRetryFailure; |
| |
| private long errorCount; |
| |
| private long errorSequences[]; |
| |
| public Threshold() { |
| } |
| |
| // Copy constructor used when a duplicate object has R/W storage so cannot be shared |
| private Threshold(Threshold t) { |
| window = t.window; |
| threshold = t.threshold; |
| action = t.action; |
| maxRetries = t.maxRetries; |
| continueOnRetryFailure = t.continueOnRetryFailure; |
| if (window >= threshold && threshold > 1) { |
| errorSequences = new long[threshold - 1]; |
| Arrays.fill(errorSequences, -window); |
| } |
| } |
| |
| public long getWindow() { |
| return window; |
| } |
| |
| public void setWindow(long aWindow) { |
| window = (int) aWindow; |
| } |
| |
| public long getThreshold() { |
| return threshold; |
| } |
| |
| public void setThreshold(long aCount) { |
| threshold = (int) aCount; |
| } |
| |
| public Threshold initialize() { |
| // Need to save error sequences if watching for more than 1 error in a window |
| // If first use of this instance, initialize array with values outside the window |
| // If shared by another delegate create a copy |
| if (window >= threshold && threshold > 1) { |
| if (errorSequences == null) { |
| errorSequences = new long[threshold - 1]; |
| Arrays.fill(errorSequences, -window); |
| return this; |
| } else { |
| return new Threshold(this); // Original in use so make a copy |
| } |
| } else { |
| return this; |
| } |
| } |
| |
| public boolean exceeded(long value) { |
| if (threshold == 0) { |
| return false; |
| } |
| return (value >= threshold - 1); |
| } |
| |
| public boolean exceededWindow(long casCount) { |
| if (threshold == 0) { |
| return false; |
| } |
| ++errorCount; |
| |
| // If no window check if total errors have REACHED the threshold |
| if (errorSequences == null) { |
| return (errorCount >= threshold); |
| } |
| // Insert in array by replacing one that is outside the window. |
| int i = threshold - 1; |
| while (--i >= 0) { |
| if (errorSequences[i] <= casCount - window) { |
| errorSequences[i] = casCount; |
| return false; |
| } |
| } |
| // If insert fails then have reached threshold. |
| // Should not be called again after returning true as may return false! |
| // But may be called again if no action specified, but then it doesn't matter. |
| return true; |
| } |
| |
| public boolean maxRetriesExceeded(long value) { |
| return (value >= maxRetries); |
| } |
| |
| public int getMaxRetries() { |
| return maxRetries; |
| } |
| |
| public void setMaxRetries(int maxRetries) { |
| this.maxRetries = maxRetries; |
| } |
| |
| public boolean getContinueOnRetryFailure() { |
| return continueOnRetryFailure; |
| } |
| |
| public void setContinueOnRetryFailure(boolean continueOnRetryFailure) { |
| this.continueOnRetryFailure = continueOnRetryFailure; |
| } |
| |
| public String getAction() { |
| return action; |
| } |
| |
| public void setAction(String action) { |
| this.action = action; |
| } |
| } |