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https://issues.apache.org/jira/browse/ARTEMIS-2617?focusedWorklogId=384705&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-384705
]
ASF GitHub Bot logged work on ARTEMIS-2617:
-------------------------------------------
Author: ASF GitHub Bot
Created on: 10/Feb/20 20:25
Start Date: 10/Feb/20 20:25
Worklog Time Spent: 10m
Work Description: franz1981 commented on pull request #2975: ARTEMIS-2617
Improve AMQP Journal loading
URL: https://github.com/apache/activemq-artemis/pull/2975#discussion_r377296935
##########
File path:
artemis-protocols/artemis-amqp-protocol/src/main/java/org/apache/activemq/artemis/protocol/amqp/broker/AMQPMessage.java
##########
@@ -1183,8 +1219,126 @@ public Object getCorrelationID() {
return this;
}
+ /**
+ *
https://en.wikipedia.org/wiki/Knuth%E2%80%93Morris%E2%80%93Pratt_algorithm jump
table
+ */
+ private static int[] createJumpTable(byte[] needle) {
+ final int[] jumpTable = new int[needle.length + 1];
+ int j = 0;
+ for (int i = 1; i < needle.length; i++) {
+ while (j > 0 && needle[j] != needle[i]) {
+ j = jumpTable[j];
+ }
+ if (needle[j] == needle[i]) {
+ j++;
+ }
+ jumpTable[i + 1] = j;
+ }
+ for (int i = 1; i < jumpTable.length; i++) {
+ if (jumpTable[i] != 0) {
+ return jumpTable;
+ }
+ }
+ // optimization over the original algorithm: it would save from
accessing any jump table
+ return null;
+ }
+
+ /**
+ *
https://en.wikipedia.org/wiki/Knuth%E2%80%93Morris%E2%80%93Pratt_algorithm
search algorithm
+ */
+ private static int indexOf(ReadableBuffer haystack, int start, int end,
byte[] needle, int[] jumpTable) {
+ final long length = end - start;
+ int j = 0;
+ final int needleLength = needle.length;
+ for (int i = 0; i < length; i++) {
+ final int index = start + i;
+ final byte value = haystack.get(index);
+ while (j > 0 && needle[j] != value) {
+ j = jumpTable == null ? 0 : jumpTable[j];
+ }
+ if (needle[j] == value) {
+ j++;
+ }
+ if (j == needleLength) {
+ final int startMatch = index - needleLength + 1;
+ return startMatch;
+ }
+ }
+ return -1;
+ }
+
+ @Override
+ public boolean hasScheduledDeliveryTime() {
+ if (scheduledTime >= 0) {
+ return true;
+ }
+ return anyMessageAnnotations(SCHEDULED_DELIVERY_SYMBOLS,
+ SCHEDULED_DELIVERY_ENCODED,
+ SCHEDULED_DELIVERY_JUMP_TABLES);
+ }
+
+ private static boolean isValidSymbolEncoding(Symbol[] symbols, byte[][]
encodedSymbols) {
+ for (int i = 0, size = symbols.length; i < size; i++) {
+ final Symbol symbol = symbols[i];
+ final byte[] encoded = encodedSymbols[i];
+ if
(!Arrays.equals(symbol.toString().getBytes(StandardCharsets.US_ASCII),
encoded)) {
+ return false;
+ }
+ }
+ return true;
+ }
+
+ private boolean anyMessageAnnotations(Symbol[] symbols, byte[][]
encodedSymbols, int[][] jumpTables) {
+ assert isValidSymbolEncoding(symbols, encodedSymbols);
+ final int count = symbols.length;
+ if (messageDataScanned == SCANNED) {
+ final MessageAnnotations messageAnnotations = this.messageAnnotations;
+ if (messageAnnotations == null) {
+ return false;
+ }
+ Map<Symbol, Object> map = messageAnnotations.getValue();
+ if (map == null) {
+ return false;
+ }
+ for (int i = 0; i < count; i++) {
+ if (map.containsKey(symbols[i])) {
+ return true;
+ }
+ }
+ return false;
+ }
+ // messageDataScanned != SCANNED;
+ final ReadableBuffer data = this.data;
+ DecoderImpl decoder = TLSEncode.getDecoder();
+ final int position = data.position();
+ decoder.setBuffer(data.rewind());
+ try {
+ while (data.hasRemaining()) {
+ TypeConstructor<?> constructor = decoder.readConstructor();
+ if (MessageAnnotations.class.equals(constructor.getTypeClass())) {
Review comment:
How to quick search for this case? So you think it would beneficial to have
such method directly on proton?
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Issue Time Tracking
-------------------
Worklog Id: (was: 384705)
Time Spent: 2h 20m (was: 2h 10m)
> Improve AMQP Journal loading
> ----------------------------
>
> Key: ARTEMIS-2617
> URL: https://issues.apache.org/jira/browse/ARTEMIS-2617
> Project: ActiveMQ Artemis
> Issue Type: Improvement
> Reporter: Francesco Nigro
> Priority: Major
> Time Spent: 2h 20m
> Remaining Estimate: 0h
>
> Journal loading AMQP messages always force decoding message data thus
> creating garbage
> on broker startup.
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