2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
6 * ================================================================================
7 * Copyright (C) 2017 Amdocs
8 * =============================================================================
9 * Licensed under the Apache License, Version 2.0 (the "License");
10 * you may not use this file except in compliance with the License.
11 * You may obtain a copy of the License at
13 * http://www.apache.org/licenses/LICENSE-2.0
15 * Unless required by applicable law or agreed to in writing, software
16 * distributed under the License is distributed on an "AS IS" BASIS,
17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18 * See the License for the specific language governing permissions and
19 * limitations under the License.
21 * ECOMP is a trademark and service mark of AT&T Intellectual Property.
22 * ============LICENSE_END=========================================================
26 package org.openecomp.appc.adapter.iaas.impl;
28 import org.openecomp.appc.Constants;
29 import org.openecomp.appc.configuration.Configuration;
30 import org.openecomp.appc.configuration.ConfigurationFactory;
31 import org.openecomp.sdnc.sli.SvcLogicContext;
34 * This class is used to track and maintain recovery and time-to-live information for a request as it is being
37 public class RequestContext {
39 * The number of seconds of wait time between successive attempts to connect to the provider. This is used to
40 * recover from provider outages or failures. It is not used to recover from logical errors, such as an invalid
41 * request, server not found, etc.
43 private Integer retryDelay;
46 * The number of times we will attempt to connect to the provider. This is used to recover from provider outages or
47 * failures. It is not used to recover from logical errors, such as an invalid request, server not found, etc.
49 private Integer retryLimit;
52 * The total time, in milliseconds, that the provider can have to process this request. If the accumulated time
53 * exceeds the time to live, then the request is failed with a timeout exception, regardless of the state of the
54 * provider. Note that the caller may supply this as a value in seconds, in which case it must be converted to
55 * milliseconds for the request context.
57 private Long timeToLive;
60 * The accumulated time, in milliseconds, that has been used so far to process the request. This is compared to the
61 * time to live each time it is updated. If the accumulated time exceeds the time to live, then the request is
62 * failed with a timeout exception, regardless of the state of the provider.
64 private long accumulatedTime;
67 * The total number of retries attempted so far
72 * The time when the stopwatch was started
74 private long startTime = -1;
77 * The service logic (DG) context from the SLI
79 private SvcLogicContext svcLogicContext;
84 private Configuration configuration = ConfigurationFactory.getConfiguration();
87 * Set to true whenever the retry limit has been exceeded, reset to false when reset() is called.
89 private boolean retryFailed;
92 * Creates the request context
95 * The service logic (SLI) context associated with the current DG
97 public RequestContext(SvcLogicContext context) {
98 setSvcLogicContext(context);
102 * @return The retry delay, in seconds. If zero, then no retry is to be performed
104 public int getRetryDelay() {
105 if (retryDelay == null) {
106 int value = configuration.getIntegerProperty(Constants.PROPERTY_RETRY_DELAY);
107 retryDelay = Integer.valueOf(value);
110 return retryDelay.intValue();
114 * This method is a helper that allows the caller to delay for the retry interval time and not have to handle the
115 * thread interruption, timer handling, etc.
117 public void delay() {
118 long time = getRetryDelay() * 1000L;
119 long future = System.currentTimeMillis() + time;
121 while (System.currentTimeMillis() < future && time > 0) {
124 } catch (InterruptedException e) {
126 * This is rare, but it can happen if another thread interrupts us while we are sleeping. In that
127 * case, the thread is resumed before the delay time has actually expired, so re-calculate the
128 * amount of delay time needed and reenter the sleep until we get to the future time.
130 time = future - System.currentTimeMillis();
137 * @return The number of retries that are allowed per connection
139 public int getRetryLimit() {
140 if (retryLimit == null) {
141 int value = configuration.getIntegerProperty(Constants.PROPERTY_RETRY_LIMIT);
142 retryLimit = Integer.valueOf(value);
145 return retryLimit.intValue();
149 * Check and count the connection attempt.
151 * @return True if the connection should be attempted. False indicates that the number of retries has been exhausted
152 * and it should NOT be attempted.
154 public boolean attempt() {
155 if (retryFailed || attempt >= getRetryLimit()) {
165 * @return The number of retry attempts so far
167 public int getAttempts() {
172 * @return True if the retry limit has been exceeded, false otherwise
174 public boolean isFailed() {
179 * This method both checks the time to live to see if it has been exceeded and accumulates the total time used so
182 * Each time this method is called it accumulates the total duration since the last time it was called to the total
183 * time accumulator. It then checks the total time to the time to live and if greater, it returns false. As long as
184 * the total time used is less than or equal to the time to live limit, the method returns true. It is important to
185 * call this method at the very beginning of the process so that all parts of the process are tracked.
188 * @return True if the total time to live has not been exceeded. False indicates that the total time to live has
189 * been exceeded and no further processing should be performed.
191 public boolean isAlive() {
192 long now = System.currentTimeMillis();
193 if (startTime == -1) {
197 accumulatedTime += (now - startTime);
199 if (accumulatedTime > timeToLive) {
206 * @return The total amount of time used, in milliseconds.
208 public long getTotalDuration() {
209 return accumulatedTime;
213 * This method is called to reset the retry counters. It has no effect on the time to live accumulator.
215 public void reset() {
220 * Sets the time to live to the value, expressed in seconds
223 * The time to live, in seconds
225 public void setTimeToLiveSeconds(int time) {
226 setTimeToLiveMS(time * 1000L);
230 * Sets the time to live to the value, expressed in milliseconds
233 * The time to live, in milliseconds
235 public void setTimeToLiveMS(long time) {
236 this.timeToLive = time;
240 * @return The service logic context associated with this request
242 public SvcLogicContext getSvcLogicContext() {
243 return svcLogicContext;
247 * @param svcLogicContext
248 * The service logic context to be associated with this request
250 public void setSvcLogicContext(SvcLogicContext svcLogicContext) {
251 this.svcLogicContext = svcLogicContext;