X-Git-Url: https://gerrit.onap.org/r/gitweb?a=blobdiff_plain;f=datarouter-node%2Fsrc%2Fmain%2Fjava%2Fcom%2Fatt%2Fresearch%2Fdatarouter%2Fnode%2FDelivery.java;fp=datarouter-node%2Fsrc%2Fmain%2Fjava%2Fcom%2Fatt%2Fresearch%2Fdatarouter%2Fnode%2FDelivery.java;h=d0e88ec95eb9ff7689030aa6b0392fb25bc29926;hb=aaf2df8b908fcb48043d2cd51803d8fd99f18b43;hp=0000000000000000000000000000000000000000;hpb=6ec9a9ce6c1062efa99da501fe8c6ea116aebf6f;p=dmaap%2Fdatarouter.git
diff --git a/datarouter-node/src/main/java/com/att/research/datarouter/node/Delivery.java b/datarouter-node/src/main/java/com/att/research/datarouter/node/Delivery.java
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+++ b/datarouter-node/src/main/java/com/att/research/datarouter/node/Delivery.java
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+/*******************************************************************************
+ * ============LICENSE_START==================================================
+ * * org.onap.dmaap
+ * * ===========================================================================
+ * * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
+ * * ===========================================================================
+ * * Licensed 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.
+ * * ============LICENSE_END====================================================
+ * *
+ * * ECOMP is a trademark and service mark of AT&T Intellectual Property.
+ * *
+ ******************************************************************************/
+
+package com.att.research.datarouter.node;
+
+import java.util.*;
+import java.io.*;
+import org.apache.log4j.Logger;
+
+/**
+ * Main control point for delivering files to destinations.
+ *
+ * The Delivery class manages assignment of delivery threads to delivery
+ * queues and creation and destruction of delivery queues as
+ * configuration changes. DeliveryQueues are assigned threads based on a
+ * modified round-robin approach giving priority to queues with more work
+ * as measured by both bytes to deliver and files to deliver and lower
+ * priority to queues that already have delivery threads working.
+ * A delivery thread continues to work for a delivery queue as long as
+ * that queue has more files to deliver.
+ */
+public class Delivery {
+ private static Logger logger = Logger.getLogger("com.att.research.datarouter.node.Delivery");
+ private static class DelItem implements Comparable {
+ private String pubid;
+ private String spool;
+ public int compareTo(DelItem x) {
+ int i = pubid.compareTo(x.pubid);
+ if (i == 0) {
+ i = spool.compareTo(x.spool);
+ }
+ return(i);
+ }
+ public String getPublishId() {
+ return(pubid);
+ }
+ public String getSpool() {
+ return(spool);
+ }
+ public DelItem(String pubid, String spool) {
+ this.pubid = pubid;
+ this.spool = spool;
+ }
+ }
+ private double fdstart;
+ private double fdstop;
+ private int threads;
+ private int curthreads;
+ private NodeConfigManager config;
+ private Hashtable dqs = new Hashtable();
+ private DeliveryQueue[] queues = new DeliveryQueue[0];
+ private int qpos = 0;
+ private long nextcheck;
+ private Runnable cmon = new Runnable() {
+ public void run() {
+ checkconfig();
+ }
+ };
+ /**
+ * Constructs a new Delivery system using the specified configuration manager.
+ * @param config The configuration manager for this delivery system.
+ */
+ public Delivery(NodeConfigManager config) {
+ this.config = config;
+ config.registerConfigTask(cmon);
+ checkconfig();
+ }
+ private void cleardir(String dir) {
+ if (dqs.get(dir) != null) {
+ return;
+ }
+ File fdir = new File(dir);
+ for (File junk: fdir.listFiles()) {
+ if (junk.isFile()) {
+ junk.delete();
+ }
+ }
+ fdir.delete();
+ }
+ private void freeDiskCheck() {
+ File spoolfile = new File(config.getSpoolBase());
+ long tspace = spoolfile.getTotalSpace();
+ long start = (long)(tspace * fdstart);
+ long stop = (long)(tspace * fdstop);
+ long cur = spoolfile.getUsableSpace();
+ if (cur >= start) {
+ return;
+ }
+ Vector cv = new Vector();
+ for (String sdir: dqs.keySet()) {
+ for (String meta: (new File(sdir)).list()) {
+ if (!meta.endsWith(".M") || meta.charAt(0) == '.') {
+ continue;
+ }
+ cv.add(new DelItem(meta.substring(0, meta.length() - 2), sdir));
+ }
+ }
+ DelItem[] items = cv.toArray(new DelItem[cv.size()]);
+ Arrays.sort(items);
+ logger.info("NODE0501 Free disk space below red threshold. current=" + cur + " red=" + start + " total=" + tspace);
+ for (DelItem item: items) {
+ long amount = dqs.get(item.getSpool()).cancelTask(item.getPublishId());
+ logger.info("NODE0502 Attempting to discard " + item.getSpool() + "/" + item.getPublishId() + " to free up disk");
+ if (amount > 0) {
+ cur += amount;
+ if (cur >= stop) {
+ cur = spoolfile.getUsableSpace();
+ }
+ if (cur >= stop) {
+ logger.info("NODE0503 Free disk space at or above yellow threshold. current=" + cur + " yellow=" + stop + " total=" + tspace);
+ return;
+ }
+ }
+ }
+ cur = spoolfile.getUsableSpace();
+ if (cur >= stop) {
+ logger.info("NODE0503 Free disk space at or above yellow threshold. current=" + cur + " yellow=" + stop + " total=" + tspace);
+ return;
+ }
+ logger.warn("NODE0504 Unable to recover sufficient disk space to reach green status. current=" + cur + " yellow=" + stop + " total=" + tspace);
+ }
+ private void cleardirs() {
+ String basedir = config.getSpoolBase();
+ String nbase = basedir + "/n";
+ for (String nodedir: (new File(nbase)).list()) {
+ if (!nodedir.startsWith(".")) {
+ cleardir(nbase + "/" + nodedir);
+ }
+ }
+ String sxbase = basedir + "/s";
+ for (String sxdir: (new File(sxbase)).list()) {
+ if (sxdir.startsWith(".")) {
+ continue;
+ }
+ File sxf = new File(sxbase + "/" + sxdir);
+ for (String sdir: sxf.list()) {
+ if (!sdir.startsWith(".")) {
+ cleardir(sxbase + "/" + sxdir + "/" + sdir);
+ }
+ }
+ sxf.delete(); // won't if anything still in it
+ }
+ }
+ private synchronized void checkconfig() {
+ if (!config.isConfigured()) {
+ return;
+ }
+ fdstart = config.getFreeDiskStart();
+ fdstop = config.getFreeDiskStop();
+ threads = config.getDeliveryThreads();
+ if (threads < 1) {
+ threads = 1;
+ }
+ DestInfo[] alldis = config.getAllDests();
+ DeliveryQueue[] nqs = new DeliveryQueue[alldis.length];
+ qpos = 0;
+ Hashtable ndqs = new Hashtable();
+ for (DestInfo di: alldis) {
+ String spl = di.getSpool();
+ DeliveryQueue dq = dqs.get(spl);
+ if (dq == null) {
+ dq = new DeliveryQueue(config, di);
+ } else {
+ dq.config(di);
+ }
+ ndqs.put(spl, dq);
+ nqs[qpos++] = dq;
+ }
+ queues = nqs;
+ dqs = ndqs;
+ cleardirs();
+ while (curthreads < threads) {
+ curthreads++;
+ (new Thread() {
+ {
+ setName("Delivery Thread");
+ }
+ public void run() {
+ dodelivery();
+ }
+ }).start();
+ }
+ nextcheck = 0;
+ notify();
+ }
+ private void dodelivery() {
+ DeliveryQueue dq;
+ while ((dq = getNextQueue()) != null) {
+ dq.run();
+ }
+ }
+ private synchronized DeliveryQueue getNextQueue() {
+ while (true) {
+ if (curthreads > threads) {
+ curthreads--;
+ return(null);
+ }
+ if (qpos < queues.length) {
+ DeliveryQueue dq = queues[qpos++];
+ if (dq.isSkipSet()) {
+ continue;
+ }
+ nextcheck = 0;
+ notify();
+ return(dq);
+ }
+ long now = System.currentTimeMillis();
+ if (now < nextcheck) {
+ try {
+ wait(nextcheck + 500 - now);
+ } catch (Exception e) {
+ }
+ now = System.currentTimeMillis();
+ }
+ if (now >= nextcheck) {
+ nextcheck = now + 5000;
+ qpos = 0;
+ freeDiskCheck();
+ }
+ }
+ }
+ /**
+ * Reset the retry timer for a delivery queue
+ */
+ public synchronized void resetQueue(String spool) {
+ if (spool != null) {
+ DeliveryQueue dq = dqs.get(spool);
+ if (dq != null) {
+ dq.resetQueue();
+ }
+ }
+ }
+}